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Finding the Fourth Proportional to 8,943.20, 13,425.60 and 8,878.40

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Solution

The fourth proportional to 8,943.20, 13,425.60 and 8,878.40 is: 13,328.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,943.20 : 13,425.60 = 8,878.40 : x
  2. Step 2: Convert to fraction form
    8,943.20/13,425.60 = 8,878.40/x
  3. Step 3: Cross multiply
    8,943.20x = 13,425.60 × 8,878.40
  4. Step 4: Simplify right side
    8,943.20x = 119,197,847.04
  5. Step 5: Solve for x
    x = 119,197,847.04/8,943.20
  6. Step 6: Final answer
    x = 13,328.32

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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.