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Finding the Fourth Proportional to 17,691.23, 24,419.90 and 10,980.79

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Solution

The fourth proportional to 17,691.23, 24,419.90 and 10,980.79 is: 15,157.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,691.23 : 24,419.90 = 10,980.79 : x
  2. Step 2: Convert to fraction form
    17,691.23/24,419.90 = 10,980.79/x
  3. Step 3: Cross multiply
    17,691.23x = 24,419.90 × 10,980.79
  4. Step 4: Simplify right side
    17,691.23x = 268,149,760.12
  5. Step 5: Solve for x
    x = 268,149,760.12/17,691.23
  6. Step 6: Final answer
    x = 15,157.21

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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.