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Finding the Fourth Proportional to 8,812.80, 13,132.80 and 8,035.20

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Solution

The fourth proportional to 8,812.80, 13,132.80 and 8,035.20 is: 11,974.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.80 : 13,132.80 = 8,035.20 : x
  2. Step 2: Convert to fraction form
    8,812.80/13,132.80 = 8,035.20/x
  3. Step 3: Cross multiply
    8,812.80x = 13,132.80 × 8,035.20
  4. Step 4: Simplify right side
    8,812.80x = 105,524,674.56
  5. Step 5: Solve for x
    x = 105,524,674.56/8,812.80
  6. Step 6: Final answer
    x = 11,974.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.