Home / 3,139.78-4,332.17-1,813.24

Finding the Fourth Proportional to 3,139.78, 4,332.17 and 1,813.24

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Solution

The fourth proportional to 3,139.78, 4,332.17 and 1,813.24 is: 2,501.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.78 : 4,332.17 = 1,813.24 : x
  2. Step 2: Convert to fraction form
    3,139.78/4,332.17 = 1,813.24/x
  3. Step 3: Cross multiply
    3,139.78x = 4,332.17 × 1,813.24
  4. Step 4: Simplify right side
    3,139.78x = 7,855,263.93
  5. Step 5: Solve for x
    x = 7,855,263.93/3,139.78
  6. Step 6: Final answer
    x = 2,501.85

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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.