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Finding the Fourth Proportional to 7,174.92, 9,901.31 and 4,191.20

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Solution

The fourth proportional to 7,174.92, 9,901.31 and 4,191.20 is: 5,783.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,174.92 : 9,901.31 = 4,191.20 : x
  2. Step 2: Convert to fraction form
    7,174.92/9,901.31 = 4,191.20/x
  3. Step 3: Cross multiply
    7,174.92x = 9,901.31 × 4,191.20
  4. Step 4: Simplify right side
    7,174.92x = 41,498,370.47
  5. Step 5: Solve for x
    x = 41,498,370.47/7,174.92
  6. Step 6: Final answer
    x = 5,783.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.