Home / 3,139.11-4,332.05-1,722.85

Finding the Fourth Proportional to 3,139.11, 4,332.05 and 1,722.85

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Solution

The fourth proportional to 3,139.11, 4,332.05 and 1,722.85 is: 2,377.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.11 : 4,332.05 = 1,722.85 : x
  2. Step 2: Convert to fraction form
    3,139.11/4,332.05 = 1,722.85/x
  3. Step 3: Cross multiply
    3,139.11x = 4,332.05 × 1,722.85
  4. Step 4: Simplify right side
    3,139.11x = 7,463,472.34
  5. Step 5: Solve for x
    x = 7,463,472.34/3,139.11
  6. Step 6: Final answer
    x = 2,377.58

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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.