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Finding the Fourth Proportional to 18,471.58, 25,487.80 and 10,513.95

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Solution

The fourth proportional to 18,471.58, 25,487.80 and 10,513.95 is: 14,507.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.58 : 25,487.80 = 10,513.95 : x
  2. Step 2: Convert to fraction form
    18,471.58/25,487.80 = 10,513.95/x
  3. Step 3: Cross multiply
    18,471.58x = 25,487.80 × 10,513.95
  4. Step 4: Simplify right side
    18,471.58x = 267,977,454.81
  5. Step 5: Solve for x
    x = 267,977,454.81/18,471.58
  6. Step 6: Final answer
    x = 14,507.55

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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.