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Finding the Fourth Proportional to 8,584.70, 12,877.05 and 5,287.10

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Solution

The fourth proportional to 8,584.70, 12,877.05 and 5,287.10 is: 7,930.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,584.70 : 12,877.05 = 5,287.10 : x
  2. Step 2: Convert to fraction form
    8,584.70/12,877.05 = 5,287.10/x
  3. Step 3: Cross multiply
    8,584.70x = 12,877.05 × 5,287.10
  4. Step 4: Simplify right side
    8,584.70x = 68,082,251.06
  5. Step 5: Solve for x
    x = 68,082,251.06/8,584.70
  6. Step 6: Final answer
    x = 7,930.65

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Double scale
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Similar ratio
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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.