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Finding the Fourth Proportional to 7,151.70, 10,727.55 and 2,221.30

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Solution

The fourth proportional to 7,151.70, 10,727.55 and 2,221.30 is: 3,331.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.70 : 10,727.55 = 2,221.30 : x
  2. Step 2: Convert to fraction form
    7,151.70/10,727.55 = 2,221.30/x
  3. Step 3: Cross multiply
    7,151.70x = 10,727.55 × 2,221.30
  4. Step 4: Simplify right side
    7,151.70x = 23,829,106.82
  5. Step 5: Solve for x
    x = 23,829,106.82/7,151.70
  6. Step 6: Final answer
    x = 3,331.95

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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.