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Finding the Fourth Proportional to 18,412.38, 25,410.24 and 11,339.19

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Solution

The fourth proportional to 18,412.38, 25,410.24 and 11,339.19 is: 15,648.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.38 : 25,410.24 = 11,339.19 : x
  2. Step 2: Convert to fraction form
    18,412.38/25,410.24 = 11,339.19/x
  3. Step 3: Cross multiply
    18,412.38x = 25,410.24 × 11,339.19
  4. Step 4: Simplify right side
    18,412.38x = 288,131,539.31
  5. Step 5: Solve for x
    x = 288,131,539.31/18,412.38
  6. Step 6: Final answer
    x = 15,648.79

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Find fourth proportional to 9,206.19, 12,705.12 and 5,669.60
Half scale
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Double scale
Find fourth proportional to 18,413.38, 25,411.62 and 11,340.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.