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Finding the Fourth Proportional to 7,151.25, 10,731.20 and 3,047.25

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Solution

The fourth proportional to 7,151.25, 10,731.20 and 3,047.25 is: 4,572.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.25 : 10,731.20 = 3,047.25 : x
  2. Step 2: Convert to fraction form
    7,151.25/10,731.20 = 3,047.25/x
  3. Step 3: Cross multiply
    7,151.25x = 10,731.20 × 3,047.25
  4. Step 4: Simplify right side
    7,151.25x = 32,700,633.96
  5. Step 5: Solve for x
    x = 32,700,633.96/7,151.25
  6. Step 6: Final answer
    x = 4,572.72

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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.