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Finding the Fourth Proportional to 27,990.38, 38,627.24 and 15,243.94

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Solution

The fourth proportional to 27,990.38, 38,627.24 and 15,243.94 is: 21,036.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.38 : 38,627.24 = 15,243.94 : x
  2. Step 2: Convert to fraction form
    27,990.38/38,627.24 = 15,243.94/x
  3. Step 3: Cross multiply
    27,990.38x = 38,627.24 × 15,243.94
  4. Step 4: Simplify right side
    27,990.38x = 588,831,328.93
  5. Step 5: Solve for x
    x = 588,831,328.93/27,990.38
  6. Step 6: Final answer
    x = 21,036.92

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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.