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Finding the Fourth Proportional to 18,497.43, 25,531.20 and 11,419.79

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Solution

The fourth proportional to 18,497.43, 25,531.20 and 11,419.79 is: 15,762.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,497.43 : 25,531.20 = 11,419.79 : x
  2. Step 2: Convert to fraction form
    18,497.43/25,531.20 = 11,419.79/x
  3. Step 3: Cross multiply
    18,497.43x = 25,531.20 × 11,419.79
  4. Step 4: Simplify right side
    18,497.43x = 291,560,814.79
  5. Step 5: Solve for x
    x = 291,560,814.79/18,497.43
  6. Step 6: Final answer
    x = 15,762.23

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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.