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Finding the Fourth Proportional to 18,657.54, 25,739.55 and 12,358.98

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Solution

The fourth proportional to 18,657.54, 25,739.55 and 12,358.98 is: 17,050.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.54 : 25,739.55 = 12,358.98 : x
  2. Step 2: Convert to fraction form
    18,657.54/25,739.55 = 12,358.98/x
  3. Step 3: Cross multiply
    18,657.54x = 25,739.55 × 12,358.98
  4. Step 4: Simplify right side
    18,657.54x = 318,114,583.66
  5. Step 5: Solve for x
    x = 318,114,583.66/18,657.54
  6. Step 6: Final answer
    x = 17,050.19

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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.