Home / 5,140.97-7,711.45-1,678.22

Finding the Fourth Proportional to 5,140.97, 7,711.45 and 1,678.22

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Solution

The fourth proportional to 5,140.97, 7,711.45 and 1,678.22 is: 2,517.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.97 : 7,711.45 = 1,678.22 : x
  2. Step 2: Convert to fraction form
    5,140.97/7,711.45 = 1,678.22/x
  3. Step 3: Cross multiply
    5,140.97x = 7,711.45 × 1,678.22
  4. Step 4: Simplify right side
    5,140.97x = 12,941,505.22
  5. Step 5: Solve for x
    x = 12,941,505.22/5,140.97
  6. Step 6: Final answer
    x = 2,517.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.