Home / 11,720.20-17,584-5,151.92

Finding the Fourth Proportional to 11,720.20, 17,584 and 5,151.92

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Solution

The fourth proportional to 11,720.20, 17,584 and 5,151.92 is: 7,729.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.20 : 17,584 = 5,151.92 : x
  2. Step 2: Convert to fraction form
    11,720.20/17,584 = 5,151.92/x
  3. Step 3: Cross multiply
    11,720.20x = 17,584 × 5,151.92
  4. Step 4: Simplify right side
    11,720.20x = 90,591,361.28
  5. Step 5: Solve for x
    x = 90,591,361.28/11,720.20
  6. Step 6: Final answer
    x = 7,729.51

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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.