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Finding the Fourth Proportional to 8,919.62, 13,320.87 and 7,167.29

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Solution

The fourth proportional to 8,919.62, 13,320.87 and 7,167.29 is: 10,703.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.62 : 13,320.87 = 7,167.29 : x
  2. Step 2: Convert to fraction form
    8,919.62/13,320.87 = 7,167.29/x
  3. Step 3: Cross multiply
    8,919.62x = 13,320.87 × 7,167.29
  4. Step 4: Simplify right side
    8,919.62x = 95,474,538.34
  5. Step 5: Solve for x
    x = 95,474,538.34/8,919.62
  6. Step 6: Final answer
    x = 10,703.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.