Home / 27,781.11-38,338.83-15,205.86

Finding the Fourth Proportional to 27,781.11, 38,338.83 and 15,205.86

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Solution

The fourth proportional to 27,781.11, 38,338.83 and 15,205.86 is: 20,984.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,781.11 : 38,338.83 = 15,205.86 : x
  2. Step 2: Convert to fraction form
    27,781.11/38,338.83 = 15,205.86/x
  3. Step 3: Cross multiply
    27,781.11x = 38,338.83 × 15,205.86
  4. Step 4: Simplify right side
    27,781.11x = 582,974,881.54
  5. Step 5: Solve for x
    x = 582,974,881.54/27,781.11
  6. Step 6: Final answer
    x = 20,984.58

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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.