Home / 3,123.20-4,691.30-2,637.20

Finding the Fourth Proportional to 3,123.20, 4,691.30 and 2,637.20

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Solution

The fourth proportional to 3,123.20, 4,691.30 and 2,637.20 is: 3,961.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.20 : 4,691.30 = 2,637.20 : x
  2. Step 2: Convert to fraction form
    3,123.20/4,691.30 = 2,637.20/x
  3. Step 3: Cross multiply
    3,123.20x = 4,691.30 × 2,637.20
  4. Step 4: Simplify right side
    3,123.20x = 12,371,896.36
  5. Step 5: Solve for x
    x = 12,371,896.36/3,123.20
  6. Step 6: Final answer
    x = 3,961.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.