Home / 5,139.40-7,717.20-3,908.20

Finding the Fourth Proportional to 5,139.40, 7,717.20 and 3,908.20

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Solution

The fourth proportional to 5,139.40, 7,717.20 and 3,908.20 is: 5,868.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.40 : 7,717.20 = 3,908.20 : x
  2. Step 2: Convert to fraction form
    5,139.40/7,717.20 = 3,908.20/x
  3. Step 3: Cross multiply
    5,139.40x = 7,717.20 × 3,908.20
  4. Step 4: Simplify right side
    5,139.40x = 30,160,361.04
  5. Step 5: Solve for x
    x = 30,160,361.04/5,139.40
  6. Step 6: Final answer
    x = 5,868.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.