Home / 3,930.75-5,422.59-2,866.95

Finding the Fourth Proportional to 3,930.75, 5,422.59 and 2,866.95

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Solution

The fourth proportional to 3,930.75, 5,422.59 and 2,866.95 is: 3,955.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.75 : 5,422.59 = 2,866.95 : x
  2. Step 2: Convert to fraction form
    3,930.75/5,422.59 = 2,866.95/x
  3. Step 3: Cross multiply
    3,930.75x = 5,422.59 × 2,866.95
  4. Step 4: Simplify right side
    3,930.75x = 15,546,294.40
  5. Step 5: Solve for x
    x = 15,546,294.40/3,930.75
  6. Step 6: Final answer
    x = 3,955.05

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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.