Home / 3,139.45-4,331.51-1,945.31

Finding the Fourth Proportional to 3,139.45, 4,331.51 and 1,945.31

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Solution

The fourth proportional to 3,139.45, 4,331.51 and 1,945.31 is: 2,683.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.45 : 4,331.51 = 1,945.31 : x
  2. Step 2: Convert to fraction form
    3,139.45/4,331.51 = 1,945.31/x
  3. Step 3: Cross multiply
    3,139.45x = 4,331.51 × 1,945.31
  4. Step 4: Simplify right side
    3,139.45x = 8,426,135.15
  5. Step 5: Solve for x
    x = 8,426,135.15/3,139.45
  6. Step 6: Final answer
    x = 2,683.96

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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.