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Finding the Fourth Proportional to 8,679.75, 13,000.65 and 5,337.82

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Solution

The fourth proportional to 8,679.75, 13,000.65 and 5,337.82 is: 7,995.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.75 : 13,000.65 = 5,337.82 : x
  2. Step 2: Convert to fraction form
    8,679.75/13,000.65 = 5,337.82/x
  3. Step 3: Cross multiply
    8,679.75x = 13,000.65 × 5,337.82
  4. Step 4: Simplify right side
    8,679.75x = 69,395,129.58
  5. Step 5: Solve for x
    x = 69,395,129.58/8,679.75
  6. Step 6: Final answer
    x = 7,995.06

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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.