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Finding the Fourth Proportional to 7,200.60, 10,800.90 and 7,127.70

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Solution

The fourth proportional to 7,200.60, 10,800.90 and 7,127.70 is: 10,691.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.60 : 10,800.90 = 7,127.70 : x
  2. Step 2: Convert to fraction form
    7,200.60/10,800.90 = 7,127.70/x
  3. Step 3: Cross multiply
    7,200.60x = 10,800.90 × 7,127.70
  4. Step 4: Simplify right side
    7,200.60x = 76,985,574.93
  5. Step 5: Solve for x
    x = 76,985,574.93/7,200.60
  6. Step 6: Final answer
    x = 10,691.55

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Half scale
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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.