Home / 7,139.97-9,853.61-3,996.27

Finding the Fourth Proportional to 7,139.97, 9,853.61 and 3,996.27

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Solution

The fourth proportional to 7,139.97, 9,853.61 and 3,996.27 is: 5,515.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.97 : 9,853.61 = 3,996.27 : x
  2. Step 2: Convert to fraction form
    7,139.97/9,853.61 = 3,996.27/x
  3. Step 3: Cross multiply
    7,139.97x = 9,853.61 × 3,996.27
  4. Step 4: Simplify right side
    7,139.97x = 39,377,666.05
  5. Step 5: Solve for x
    x = 39,377,666.05/7,139.97
  6. Step 6: Final answer
    x = 5,515.10

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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.