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Finding the Fourth Proportional to 27,876.70, 38,469.72 and 15,129.94

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Solution

The fourth proportional to 27,876.70, 38,469.72 and 15,129.94 is: 20,879.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,876.70 : 38,469.72 = 15,129.94 : x
  2. Step 2: Convert to fraction form
    27,876.70/38,469.72 = 15,129.94/x
  3. Step 3: Cross multiply
    27,876.70x = 38,469.72 × 15,129.94
  4. Step 4: Simplify right side
    27,876.70x = 582,044,555.42
  5. Step 5: Solve for x
    x = 582,044,555.42/27,876.70
  6. Step 6: Final answer
    x = 20,879.25

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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.