Home / 20,139.20-27,792.97-11,187.53

Finding the Fourth Proportional to 20,139.20, 27,792.97 and 11,187.53

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Solution

The fourth proportional to 20,139.20, 27,792.97 and 11,187.53 is: 15,439.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.20 : 27,792.97 = 11,187.53 : x
  2. Step 2: Convert to fraction form
    20,139.20/27,792.97 = 11,187.53/x
  3. Step 3: Cross multiply
    20,139.20x = 27,792.97 × 11,187.53
  4. Step 4: Simplify right side
    20,139.20x = 310,934,727.18
  5. Step 5: Solve for x
    x = 310,934,727.18/20,139.20
  6. Step 6: Final answer
    x = 15,439.28

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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.