Home / 3,139.16-4,332.29-1,812.78

Finding the Fourth Proportional to 3,139.16, 4,332.29 and 1,812.78

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Solution

The fourth proportional to 3,139.16, 4,332.29 and 1,812.78 is: 2,501.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.16 : 4,332.29 = 1,812.78 : x
  2. Step 2: Convert to fraction form
    3,139.16/4,332.29 = 1,812.78/x
  3. Step 3: Cross multiply
    3,139.16x = 4,332.29 × 1,812.78
  4. Step 4: Simplify right side
    3,139.16x = 7,853,479.60
  5. Step 5: Solve for x
    x = 7,853,479.60/3,139.16
  6. Step 6: Final answer
    x = 2,501.78

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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.