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Finding the Fourth Proportional to 8,760.60, 13,129.95 and 4,379.28

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Solution

The fourth proportional to 8,760.60, 13,129.95 and 4,379.28 is: 6,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.60 : 13,129.95 = 4,379.28 : x
  2. Step 2: Convert to fraction form
    8,760.60/13,129.95 = 4,379.28/x
  3. Step 3: Cross multiply
    8,760.60x = 13,129.95 × 4,379.28
  4. Step 4: Simplify right side
    8,760.60x = 57,499,727.44
  5. Step 5: Solve for x
    x = 57,499,727.44/8,760.60
  6. Step 6: Final answer
    x = 6,563.45

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1.5x scale

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.