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Finding the Fourth Proportional to 7,480.70, 11,221.05 and 5,731.10

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Solution

The fourth proportional to 7,480.70, 11,221.05 and 5,731.10 is: 8,596.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,480.70 : 11,221.05 = 5,731.10 : x
  2. Step 2: Convert to fraction form
    7,480.70/11,221.05 = 5,731.10/x
  3. Step 3: Cross multiply
    7,480.70x = 11,221.05 × 5,731.10
  4. Step 4: Simplify right side
    7,480.70x = 64,308,959.66
  5. Step 5: Solve for x
    x = 64,308,959.66/7,480.70
  6. Step 6: Final answer
    x = 8,596.65

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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.