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Finding the Fourth Proportional to 8,751.68, 13,133.20 and 5,239.04

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Solution

The fourth proportional to 8,751.68, 13,133.20 and 5,239.04 is: 7,861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,751.68 : 13,133.20 = 5,239.04 : x
  2. Step 2: Convert to fraction form
    8,751.68/13,133.20 = 5,239.04/x
  3. Step 3: Cross multiply
    8,751.68x = 13,133.20 × 5,239.04
  4. Step 4: Simplify right side
    8,751.68x = 68,805,360.13
  5. Step 5: Solve for x
    x = 68,805,360.13/8,751.68
  6. Step 6: Final answer
    x = 7,861.96

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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.