Home / 3,139.38-4,331.10-1,812.81

Finding the Fourth Proportional to 3,139.38, 4,331.10 and 1,812.81

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Solution

The fourth proportional to 3,139.38, 4,331.10 and 1,812.81 is: 2,500.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.38 : 4,331.10 = 1,812.81 : x
  2. Step 2: Convert to fraction form
    3,139.38/4,331.10 = 1,812.81/x
  3. Step 3: Cross multiply
    3,139.38x = 4,331.10 × 1,812.81
  4. Step 4: Simplify right side
    3,139.38x = 7,851,461.39
  5. Step 5: Solve for x
    x = 7,851,461.39/3,139.38
  6. Step 6: Final answer
    x = 2,500.96

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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.