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Finding the Fourth Proportional to 15,663.76, 21,612.85 and 8,951.59

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Solution

The fourth proportional to 15,663.76, 21,612.85 and 8,951.59 is: 12,351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.76 : 21,612.85 = 8,951.59 : x
  2. Step 2: Convert to fraction form
    15,663.76/21,612.85 = 8,951.59/x
  3. Step 3: Cross multiply
    15,663.76x = 21,612.85 × 8,951.59
  4. Step 4: Simplify right side
    15,663.76x = 193,469,371.93
  5. Step 5: Solve for x
    x = 193,469,371.93/15,663.76
  6. Step 6: Final answer
    x = 12,351.40

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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.