Home / 3,990.47-5,504.35-2,869.63

Finding the Fourth Proportional to 3,990.47, 5,504.35 and 2,869.63

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Solution

The fourth proportional to 3,990.47, 5,504.35 and 2,869.63 is: 3,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.47 : 5,504.35 = 2,869.63 : x
  2. Step 2: Convert to fraction form
    3,990.47/5,504.35 = 2,869.63/x
  3. Step 3: Cross multiply
    3,990.47x = 5,504.35 × 2,869.63
  4. Step 4: Simplify right side
    3,990.47x = 15,795,452.98
  5. Step 5: Solve for x
    x = 15,795,452.98/3,990.47
  6. Step 6: Final answer
    x = 3,958.30

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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.