Home / 13,149.28-19,720.97-3,787.21

Finding the Fourth Proportional to 13,149.28, 19,720.97 and 3,787.21

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Solution

The fourth proportional to 13,149.28, 19,720.97 and 3,787.21 is: 5,679.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.28 : 19,720.97 = 3,787.21 : x
  2. Step 2: Convert to fraction form
    13,149.28/19,720.97 = 3,787.21/x
  3. Step 3: Cross multiply
    13,149.28x = 19,720.97 × 3,787.21
  4. Step 4: Simplify right side
    13,149.28x = 74,687,454.79
  5. Step 5: Solve for x
    x = 74,687,454.79/13,149.28
  6. Step 6: Final answer
    x = 5,679.97

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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.