Home / 3,921.13-5,877.57-1,287.95

Finding the Fourth Proportional to 3,921.13, 5,877.57 and 1,287.95

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Solution

The fourth proportional to 3,921.13, 5,877.57 and 1,287.95 is: 1,930.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.13 : 5,877.57 = 1,287.95 : x
  2. Step 2: Convert to fraction form
    3,921.13/5,877.57 = 1,287.95/x
  3. Step 3: Cross multiply
    3,921.13x = 5,877.57 × 1,287.95
  4. Step 4: Simplify right side
    3,921.13x = 7,570,016.28
  5. Step 5: Solve for x
    x = 7,570,016.28/3,921.13
  6. Step 6: Final answer
    x = 1,930.57

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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.