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Finding the Fourth Proportional to 7,139.05, 9,851.68 and 3,952.48

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Solution

The fourth proportional to 7,139.05, 9,851.68 and 3,952.48 is: 5,454.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.05 : 9,851.68 = 3,952.48 : x
  2. Step 2: Convert to fraction form
    7,139.05/9,851.68 = 3,952.48/x
  3. Step 3: Cross multiply
    7,139.05x = 9,851.68 × 3,952.48
  4. Step 4: Simplify right side
    7,139.05x = 38,938,568.17
  5. Step 5: Solve for x
    x = 38,938,568.17/7,139.05
  6. Step 6: Final answer
    x = 5,454.31

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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.