Home / 3,901.95-5,385.20-2,223.90

Finding the Fourth Proportional to 3,901.95, 5,385.20 and 2,223.90

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Solution

The fourth proportional to 3,901.95, 5,385.20 and 2,223.90 is: 3,069.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,901.95 : 5,385.20 = 2,223.90 : x
  2. Step 2: Convert to fraction form
    3,901.95/5,385.20 = 2,223.90/x
  3. Step 3: Cross multiply
    3,901.95x = 5,385.20 × 2,223.90
  4. Step 4: Simplify right side
    3,901.95x = 11,976,135.16
  5. Step 5: Solve for x
    x = 11,976,135.16/3,901.95
  6. Step 6: Final answer
    x = 3,069.27

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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.