Home / 3,989.11-5,506.20-2,729.69

Finding the Fourth Proportional to 3,989.11, 5,506.20 and 2,729.69

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Solution

The fourth proportional to 3,989.11, 5,506.20 and 2,729.69 is: 3,767.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.11 : 5,506.20 = 2,729.69 : x
  2. Step 2: Convert to fraction form
    3,989.11/5,506.20 = 2,729.69/x
  3. Step 3: Cross multiply
    3,989.11x = 5,506.20 × 2,729.69
  4. Step 4: Simplify right side
    3,989.11x = 15,030,219.08
  5. Step 5: Solve for x
    x = 15,030,219.08/3,989.11
  6. Step 6: Final answer
    x = 3,767.82

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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.