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Finding the Fourth Proportional to 27,139.44, 40,656.16 and 18,704.44

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Solution

The fourth proportional to 27,139.44, 40,656.16 and 18,704.44 is: 28,020.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,139.44 : 40,656.16 = 18,704.44 : x
  2. Step 2: Convert to fraction form
    27,139.44/40,656.16 = 18,704.44/x
  3. Step 3: Cross multiply
    27,139.44x = 40,656.16 × 18,704.44
  4. Step 4: Simplify right side
    27,139.44x = 760,450,705.35
  5. Step 5: Solve for x
    x = 760,450,705.35/27,139.44
  6. Step 6: Final answer
    x = 28,020.13

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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.