Home / 3,128.11-4,693.47-1,372.20

Finding the Fourth Proportional to 3,128.11, 4,693.47 and 1,372.20

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Solution

The fourth proportional to 3,128.11, 4,693.47 and 1,372.20 is: 2,058.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.11 : 4,693.47 = 1,372.20 : x
  2. Step 2: Convert to fraction form
    3,128.11/4,693.47 = 1,372.20/x
  3. Step 3: Cross multiply
    3,128.11x = 4,693.47 × 1,372.20
  4. Step 4: Simplify right side
    3,128.11x = 6,440,400.25
  5. Step 5: Solve for x
    x = 6,440,400.25/3,128.11
  6. Step 6: Final answer
    x = 2,058.88

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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.