Home / 7,139.92-9,853.14-3,996.40

Finding the Fourth Proportional to 7,139.92, 9,853.14 and 3,996.40

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Solution

The fourth proportional to 7,139.92, 9,853.14 and 3,996.40 is: 5,515.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.92 : 9,853.14 = 3,996.40 : x
  2. Step 2: Convert to fraction form
    7,139.92/9,853.14 = 3,996.40/x
  3. Step 3: Cross multiply
    7,139.92x = 9,853.14 × 3,996.40
  4. Step 4: Simplify right side
    7,139.92x = 39,377,088.70
  5. Step 5: Solve for x
    x = 39,377,088.70/7,139.92
  6. Step 6: Final answer
    x = 5,515.06

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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.