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Finding the Fourth Proportional to 8,951.91, 13,428 and 3,108.72

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Solution

The fourth proportional to 8,951.91, 13,428 and 3,108.72 is: 4,663.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,951.91 : 13,428 = 3,108.72 : x
  2. Step 2: Convert to fraction form
    8,951.91/13,428 = 3,108.72/x
  3. Step 3: Cross multiply
    8,951.91x = 13,428 × 3,108.72
  4. Step 4: Simplify right side
    8,951.91x = 41,743,892.16
  5. Step 5: Solve for x
    x = 41,743,892.16/8,951.91
  6. Step 6: Final answer
    x = 4,663.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.