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Finding the Fourth Proportional to 8,639.14, 12,984.27 and 7,167.91

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Solution

The fourth proportional to 8,639.14, 12,984.27 and 7,167.91 is: 10,773.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.14 : 12,984.27 = 7,167.91 : x
  2. Step 2: Convert to fraction form
    8,639.14/12,984.27 = 7,167.91/x
  3. Step 3: Cross multiply
    8,639.14x = 12,984.27 × 7,167.91
  4. Step 4: Simplify right side
    8,639.14x = 93,070,078.78
  5. Step 5: Solve for x
    x = 93,070,078.78/8,639.14
  6. Step 6: Final answer
    x = 10,773.07

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1.5x scale

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.