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Finding the Fourth Proportional to 31,108.84, 42,929.13 and 17,679.86

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Solution

The fourth proportional to 31,108.84, 42,929.13 and 17,679.86 is: 24,397.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.84 : 42,929.13 = 17,679.86 : x
  2. Step 2: Convert to fraction form
    31,108.84/42,929.13 = 17,679.86/x
  3. Step 3: Cross multiply
    31,108.84x = 42,929.13 × 17,679.86
  4. Step 4: Simplify right side
    31,108.84x = 758,981,008.32
  5. Step 5: Solve for x
    x = 758,981,008.32/31,108.84
  6. Step 6: Final answer
    x = 24,397.60

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.