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Finding the Fourth Proportional to 28,846.38, 43,239.87 and 20,929.17

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Solution

The fourth proportional to 28,846.38, 43,239.87 and 20,929.17 is: 31,372.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,846.38 : 43,239.87 = 20,929.17 : x
  2. Step 2: Convert to fraction form
    28,846.38/43,239.87 = 20,929.17/x
  3. Step 3: Cross multiply
    28,846.38x = 43,239.87 × 20,929.17
  4. Step 4: Simplify right side
    28,846.38x = 904,974,590.01
  5. Step 5: Solve for x
    x = 904,974,590.01/28,846.38
  6. Step 6: Final answer
    x = 31,372.21

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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.