Home / 3,721.02-5,135-2,149.12

Finding the Fourth Proportional to 3,721.02, 5,135 and 2,149.12

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Solution

The fourth proportional to 3,721.02, 5,135 and 2,149.12 is: 2,965.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.02 : 5,135 = 2,149.12 : x
  2. Step 2: Convert to fraction form
    3,721.02/5,135 = 2,149.12/x
  3. Step 3: Cross multiply
    3,721.02x = 5,135 × 2,149.12
  4. Step 4: Simplify right side
    3,721.02x = 11,035,731.20
  5. Step 5: Solve for x
    x = 11,035,731.20/3,721.02
  6. Step 6: Final answer
    x = 2,965.78

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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.