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Finding the Fourth Proportional to 8,789.92, 12,129.35 and 5,013.70

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Solution

The fourth proportional to 8,789.92, 12,129.35 and 5,013.70 is: 6,918.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.92 : 12,129.35 = 5,013.70 : x
  2. Step 2: Convert to fraction form
    8,789.92/12,129.35 = 5,013.70/x
  3. Step 3: Cross multiply
    8,789.92x = 12,129.35 × 5,013.70
  4. Step 4: Simplify right side
    8,789.92x = 60,812,866.70
  5. Step 5: Solve for x
    x = 60,812,866.70/8,789.92
  6. Step 6: Final answer
    x = 6,918.48

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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.