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Finding the Fourth Proportional to 8,760.76, 12,086.73 and 5,174.95

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Solution

The fourth proportional to 8,760.76, 12,086.73 and 5,174.95 is: 7,139.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.76 : 12,086.73 = 5,174.95 : x
  2. Step 2: Convert to fraction form
    8,760.76/12,086.73 = 5,174.95/x
  3. Step 3: Cross multiply
    8,760.76x = 12,086.73 × 5,174.95
  4. Step 4: Simplify right side
    8,760.76x = 62,548,199.14
  5. Step 5: Solve for x
    x = 62,548,199.14/8,760.76
  6. Step 6: Final answer
    x = 7,139.59

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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.