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Finding the Fourth Proportional to 8,760.80, 12,089.87 and 4,781.91

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Solution

The fourth proportional to 8,760.80, 12,089.87 and 4,781.91 is: 6,599.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.80 : 12,089.87 = 4,781.91 : x
  2. Step 2: Convert to fraction form
    8,760.80/12,089.87 = 4,781.91/x
  3. Step 3: Cross multiply
    8,760.80x = 12,089.87 × 4,781.91
  4. Step 4: Simplify right side
    8,760.80x = 57,812,646.34
  5. Step 5: Solve for x
    x = 57,812,646.34/8,760.80
  6. Step 6: Final answer
    x = 6,599.02

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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.