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Finding the Fourth Proportional to 8,520.28, 12,765.04 and 7,132.12

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Solution

The fourth proportional to 8,520.28, 12,765.04 and 7,132.12 is: 10,685.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.28 : 12,765.04 = 7,132.12 : x
  2. Step 2: Convert to fraction form
    8,520.28/12,765.04 = 7,132.12/x
  3. Step 3: Cross multiply
    8,520.28x = 12,765.04 × 7,132.12
  4. Step 4: Simplify right side
    8,520.28x = 91,041,797.08
  5. Step 5: Solve for x
    x = 91,041,797.08/8,520.28
  6. Step 6: Final answer
    x = 10,685.31

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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.