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Finding the Fourth Proportional to 27,155.10, 40,721.11 and 12,373.41

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Solution

The fourth proportional to 27,155.10, 40,721.11 and 12,373.41 is: 18,554.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,155.10 : 40,721.11 = 12,373.41 : x
  2. Step 2: Convert to fraction form
    27,155.10/40,721.11 = 12,373.41/x
  3. Step 3: Cross multiply
    27,155.10x = 40,721.11 × 12,373.41
  4. Step 4: Simplify right side
    27,155.10x = 503,859,111.46
  5. Step 5: Solve for x
    x = 503,859,111.46/27,155.10
  6. Step 6: Final answer
    x = 18,554.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.