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Finding the Fourth Proportional to 17,878.23, 24,672.15 and 9,921.20

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Solution

The fourth proportional to 17,878.23, 24,672.15 and 9,921.20 is: 13,691.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,878.23 : 24,672.15 = 9,921.20 : x
  2. Step 2: Convert to fraction form
    17,878.23/24,672.15 = 9,921.20/x
  3. Step 3: Cross multiply
    17,878.23x = 24,672.15 × 9,921.20
  4. Step 4: Simplify right side
    17,878.23x = 244,777,211.22
  5. Step 5: Solve for x
    x = 244,777,211.22/17,878.23
  6. Step 6: Final answer
    x = 13,691.36

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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.