Home / 7,139.97-9,853.11-4,157.55

Finding the Fourth Proportional to 7,139.97, 9,853.11 and 4,157.55

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Solution

The fourth proportional to 7,139.97, 9,853.11 and 4,157.55 is: 5,737.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.97 : 9,853.11 = 4,157.55 : x
  2. Step 2: Convert to fraction form
    7,139.97/9,853.11 = 4,157.55/x
  3. Step 3: Cross multiply
    7,139.97x = 9,853.11 × 4,157.55
  4. Step 4: Simplify right side
    7,139.97x = 40,964,797.48
  5. Step 5: Solve for x
    x = 40,964,797.48/7,139.97
  6. Step 6: Final answer
    x = 5,737.39

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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.