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Finding the Fourth Proportional to 9,115.60, 13,651.80 and 5,616.40

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Solution

The fourth proportional to 9,115.60, 13,651.80 and 5,616.40 is: 8,411.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.60 : 13,651.80 = 5,616.40 : x
  2. Step 2: Convert to fraction form
    9,115.60/13,651.80 = 5,616.40/x
  3. Step 3: Cross multiply
    9,115.60x = 13,651.80 × 5,616.40
  4. Step 4: Simplify right side
    9,115.60x = 76,673,969.52
  5. Step 5: Solve for x
    x = 76,673,969.52/9,115.60
  6. Step 6: Final answer
    x = 8,411.29

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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.