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Finding the Fourth Proportional to 8,789.92, 12,130.38 and 5,013.64

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Solution

The fourth proportional to 8,789.92, 12,130.38 and 5,013.64 is: 6,918.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.92 : 12,130.38 = 5,013.64 : x
  2. Step 2: Convert to fraction form
    8,789.92/12,130.38 = 5,013.64/x
  3. Step 3: Cross multiply
    8,789.92x = 12,130.38 × 5,013.64
  4. Step 4: Simplify right side
    8,789.92x = 60,817,358.38
  5. Step 5: Solve for x
    x = 60,817,358.38/8,789.92
  6. Step 6: Final answer
    x = 6,918.99

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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.