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Finding the Fourth Proportional to 7,081.47, 9,772.45 and 3,938.27

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Solution

The fourth proportional to 7,081.47, 9,772.45 and 3,938.27 is: 5,434.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,081.47 : 9,772.45 = 3,938.27 : x
  2. Step 2: Convert to fraction form
    7,081.47/9,772.45 = 3,938.27/x
  3. Step 3: Cross multiply
    7,081.47x = 9,772.45 × 3,938.27
  4. Step 4: Simplify right side
    7,081.47x = 38,486,478.11
  5. Step 5: Solve for x
    x = 38,486,478.11/7,081.47
  6. Step 6: Final answer
    x = 5,434.81

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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.