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Finding the Fourth Proportional to 7,616.80, 11,425.20 and 4,992.40

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Solution

The fourth proportional to 7,616.80, 11,425.20 and 4,992.40 is: 7,488.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,616.80 : 11,425.20 = 4,992.40 : x
  2. Step 2: Convert to fraction form
    7,616.80/11,425.20 = 4,992.40/x
  3. Step 3: Cross multiply
    7,616.80x = 11,425.20 × 4,992.40
  4. Step 4: Simplify right side
    7,616.80x = 57,039,168.48
  5. Step 5: Solve for x
    x = 57,039,168.48/7,616.80
  6. Step 6: Final answer
    x = 7,488.60

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Similar ratio
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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.