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Finding the Fourth Proportional to 7,277.10, 10,915.65 and 7,179.90

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Solution

The fourth proportional to 7,277.10, 10,915.65 and 7,179.90 is: 10,769.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,277.10 : 10,915.65 = 7,179.90 : x
  2. Step 2: Convert to fraction form
    7,277.10/10,915.65 = 7,179.90/x
  3. Step 3: Cross multiply
    7,277.10x = 10,915.65 × 7,179.90
  4. Step 4: Simplify right side
    7,277.10x = 78,373,275.44
  5. Step 5: Solve for x
    x = 78,373,275.44/7,277.10
  6. Step 6: Final answer
    x = 10,769.85

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Double scale
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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.