Home / 3,990.31-5,506.67-2,221.95

Finding the Fourth Proportional to 3,990.31, 5,506.67 and 2,221.95

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Solution

The fourth proportional to 3,990.31, 5,506.67 and 2,221.95 is: 3,066.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.31 : 5,506.67 = 2,221.95 : x
  2. Step 2: Convert to fraction form
    3,990.31/5,506.67 = 2,221.95/x
  3. Step 3: Cross multiply
    3,990.31x = 5,506.67 × 2,221.95
  4. Step 4: Simplify right side
    3,990.31x = 12,235,528.14
  5. Step 5: Solve for x
    x = 12,235,528.14/3,990.31
  6. Step 6: Final answer
    x = 3,066.31

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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.