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Finding the Fourth Proportional to 18,368.70, 25,346.55 and 12,413.34

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Solution

The fourth proportional to 18,368.70, 25,346.55 and 12,413.34 is: 17,128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.70 : 25,346.55 = 12,413.34 : x
  2. Step 2: Convert to fraction form
    18,368.70/25,346.55 = 12,413.34/x
  3. Step 3: Cross multiply
    18,368.70x = 25,346.55 × 12,413.34
  4. Step 4: Simplify right side
    18,368.70x = 314,635,342.98
  5. Step 5: Solve for x
    x = 314,635,342.98/18,368.70
  6. Step 6: Final answer
    x = 17,128.88

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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.