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Finding the Fourth Proportional to 18,470.88, 25,489.80 and 11,397.24

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Solution

The fourth proportional to 18,470.88, 25,489.80 and 11,397.24 is: 15,728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470.88 : 25,489.80 = 11,397.24 : x
  2. Step 2: Convert to fraction form
    18,470.88/25,489.80 = 11,397.24/x
  3. Step 3: Cross multiply
    18,470.88x = 25,489.80 × 11,397.24
  4. Step 4: Simplify right side
    18,470.88x = 290,513,368.15
  5. Step 5: Solve for x
    x = 290,513,368.15/18,470.88
  6. Step 6: Final answer
    x = 15,728.18

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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.