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Finding the Fourth Proportional to 8,757.16, 12,080.18 and 5,920.80

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Solution

The fourth proportional to 8,757.16, 12,080.18 and 5,920.80 is: 8,167.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.16 : 12,080.18 = 5,920.80 : x
  2. Step 2: Convert to fraction form
    8,757.16/12,080.18 = 5,920.80/x
  3. Step 3: Cross multiply
    8,757.16x = 12,080.18 × 5,920.80
  4. Step 4: Simplify right side
    8,757.16x = 71,524,329.74
  5. Step 5: Solve for x
    x = 71,524,329.74/8,757.16
  6. Step 6: Final answer
    x = 8,167.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.