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Finding the Fourth Proportional to 18,471.52, 25,489.74 and 10,513.72

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Solution

The fourth proportional to 18,471.52, 25,489.74 and 10,513.72 is: 14,508.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.52 : 25,489.74 = 10,513.72 : x
  2. Step 2: Convert to fraction form
    18,471.52/25,489.74 = 10,513.72/x
  3. Step 3: Cross multiply
    18,471.52x = 25,489.74 × 10,513.72
  4. Step 4: Simplify right side
    18,471.52x = 267,991,989.23
  5. Step 5: Solve for x
    x = 267,991,989.23/18,471.52
  6. Step 6: Final answer
    x = 14,508.39

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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.