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Finding the Fourth Proportional to 18,457.31, 25,471.10 and 11,387.84

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Solution

The fourth proportional to 18,457.31, 25,471.10 and 11,387.84 is: 15,715.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,457.31 : 25,471.10 = 11,387.84 : x
  2. Step 2: Convert to fraction form
    18,457.31/25,471.10 = 11,387.84/x
  3. Step 3: Cross multiply
    18,457.31x = 25,471.10 × 11,387.84
  4. Step 4: Simplify right side
    18,457.31x = 290,060,712.54
  5. Step 5: Solve for x
    x = 290,060,712.54/18,457.31
  6. Step 6: Final answer
    x = 15,715.22

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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.