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Finding the Fourth Proportional to 8,947.20, 13,431.60 and 8,882.40

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Solution

The fourth proportional to 8,947.20, 13,431.60 and 8,882.40 is: 13,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,947.20 : 13,431.60 = 8,882.40 : x
  2. Step 2: Convert to fraction form
    8,947.20/13,431.60 = 8,882.40/x
  3. Step 3: Cross multiply
    8,947.20x = 13,431.60 × 8,882.40
  4. Step 4: Simplify right side
    8,947.20x = 119,304,843.84
  5. Step 5: Solve for x
    x = 119,304,843.84/8,947.20
  6. Step 6: Final answer
    x = 13,334.32

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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.