Home / 3,900.16-5,380.89-2,220.95

Finding the Fourth Proportional to 3,900.16, 5,380.89 and 2,220.95

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Solution

The fourth proportional to 3,900.16, 5,380.89 and 2,220.95 is: 3,064.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.16 : 5,380.89 = 2,220.95 : x
  2. Step 2: Convert to fraction form
    3,900.16/5,380.89 = 2,220.95/x
  3. Step 3: Cross multiply
    3,900.16x = 5,380.89 × 2,220.95
  4. Step 4: Simplify right side
    3,900.16x = 11,950,702.86
  5. Step 5: Solve for x
    x = 11,950,702.86/3,900.16
  6. Step 6: Final answer
    x = 3,064.16

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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.