Home / 3,728.88-5,128.65-3,131.10

Finding the Fourth Proportional to 3,728.88, 5,128.65 and 3,131.10

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Solution

The fourth proportional to 3,728.88, 5,128.65 and 3,131.10 is: 4,306.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.88 : 5,128.65 = 3,131.10 : x
  2. Step 2: Convert to fraction form
    3,728.88/5,128.65 = 3,131.10/x
  3. Step 3: Cross multiply
    3,728.88x = 5,128.65 × 3,131.10
  4. Step 4: Simplify right side
    3,728.88x = 16,058,316.02
  5. Step 5: Solve for x
    x = 16,058,316.02/3,728.88
  6. Step 6: Final answer
    x = 4,306.47

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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.