Home / 3,139.57-4,331.31-1,812.34

Finding the Fourth Proportional to 3,139.57, 4,331.31 and 1,812.34

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Solution

The fourth proportional to 3,139.57, 4,331.31 and 1,812.34 is: 2,500.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.57 : 4,331.31 = 1,812.34 : x
  2. Step 2: Convert to fraction form
    3,139.57/4,331.31 = 1,812.34/x
  3. Step 3: Cross multiply
    3,139.57x = 4,331.31 × 1,812.34
  4. Step 4: Simplify right side
    3,139.57x = 7,849,784.71
  5. Step 5: Solve for x
    x = 7,849,784.71/3,139.57
  6. Step 6: Final answer
    x = 2,500.27

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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.