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Finding the Fourth Proportional to 27,755.67, 38,302.89 and 15,819.51

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Solution

The fourth proportional to 27,755.67, 38,302.89 and 15,819.51 is: 21,830.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,755.67 : 38,302.89 = 15,819.51 : x
  2. Step 2: Convert to fraction form
    27,755.67/38,302.89 = 15,819.51/x
  3. Step 3: Cross multiply
    27,755.67x = 38,302.89 × 15,819.51
  4. Step 4: Simplify right side
    27,755.67x = 605,932,951.38
  5. Step 5: Solve for x
    x = 605,932,951.38/27,755.67
  6. Step 6: Final answer
    x = 21,830.96

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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.