Home / 8,728.20-12,042.42-5,581.80

Finding the Fourth Proportional to 8,728.20, 12,042.42 and 5,581.80

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Solution

The fourth proportional to 8,728.20, 12,042.42 and 5,581.80 is: 7,701.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.20 : 12,042.42 = 5,581.80 : x
  2. Step 2: Convert to fraction form
    8,728.20/12,042.42 = 5,581.80/x
  3. Step 3: Cross multiply
    8,728.20x = 12,042.42 × 5,581.80
  4. Step 4: Simplify right side
    8,728.20x = 67,218,379.96
  5. Step 5: Solve for x
    x = 67,218,379.96/8,728.20
  6. Step 6: Final answer
    x = 7,701.29

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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.