Home / 3,990.72-5,504.70-2,854.29

Finding the Fourth Proportional to 3,990.72, 5,504.70 and 2,854.29

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Solution

The fourth proportional to 3,990.72, 5,504.70 and 2,854.29 is: 3,937.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.72 : 5,504.70 = 2,854.29 : x
  2. Step 2: Convert to fraction form
    3,990.72/5,504.70 = 2,854.29/x
  3. Step 3: Cross multiply
    3,990.72x = 5,504.70 × 2,854.29
  4. Step 4: Simplify right side
    3,990.72x = 15,712,010.16
  5. Step 5: Solve for x
    x = 15,712,010.16/3,990.72
  6. Step 6: Final answer
    x = 3,937.14

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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.