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Finding the Fourth Proportional to 7,132.42, 9,841.98 and 3,945.21

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Solution

The fourth proportional to 7,132.42, 9,841.98 and 3,945.21 is: 5,443.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,132.42 : 9,841.98 = 3,945.21 : x
  2. Step 2: Convert to fraction form
    7,132.42/9,841.98 = 3,945.21/x
  3. Step 3: Cross multiply
    7,132.42x = 9,841.98 × 3,945.21
  4. Step 4: Simplify right side
    7,132.42x = 38,828,677.92
  5. Step 5: Solve for x
    x = 38,828,677.92/7,132.42
  6. Step 6: Final answer
    x = 5,443.97

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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.