Home / 27,781.38-38,338.57-15,206.40

Finding the Fourth Proportional to 27,781.38, 38,338.57 and 15,206.40

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Solution

The fourth proportional to 27,781.38, 38,338.57 and 15,206.40 is: 20,984.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,781.38 : 38,338.57 = 15,206.40 : x
  2. Step 2: Convert to fraction form
    27,781.38/38,338.57 = 15,206.40/x
  3. Step 3: Cross multiply
    27,781.38x = 38,338.57 × 15,206.40
  4. Step 4: Simplify right side
    27,781.38x = 582,991,630.85
  5. Step 5: Solve for x
    x = 582,991,630.85/27,781.38
  6. Step 6: Final answer
    x = 20,984.98

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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.