Home / 3,139.40-4,331.85-1,812.92

Finding the Fourth Proportional to 3,139.40, 4,331.85 and 1,812.92

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Solution

The fourth proportional to 3,139.40, 4,331.85 and 1,812.92 is: 2,501.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.40 : 4,331.85 = 1,812.92 : x
  2. Step 2: Convert to fraction form
    3,139.40/4,331.85 = 1,812.92/x
  3. Step 3: Cross multiply
    3,139.40x = 4,331.85 × 1,812.92
  4. Step 4: Simplify right side
    3,139.40x = 7,853,275.84
  5. Step 5: Solve for x
    x = 7,853,275.84/3,139.40
  6. Step 6: Final answer
    x = 2,501.53

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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.