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Finding the Fourth Proportional to 8,863.90, 13,279.45 and 5,167.90

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Solution

The fourth proportional to 8,863.90, 13,279.45 and 5,167.90 is: 7,742.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,863.90 : 13,279.45 = 5,167.90 : x
  2. Step 2: Convert to fraction form
    8,863.90/13,279.45 = 5,167.90/x
  3. Step 3: Cross multiply
    8,863.90x = 13,279.45 × 5,167.90
  4. Step 4: Simplify right side
    8,863.90x = 68,626,869.66
  5. Step 5: Solve for x
    x = 68,626,869.66/8,863.90
  6. Step 6: Final answer
    x = 7,742.29

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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.