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Finding the Fourth Proportional to 28,751.88, 39,677.28 and 16,005

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Solution

The fourth proportional to 28,751.88, 39,677.28 and 16,005 is: 22,086.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,751.88 : 39,677.28 = 16,005 : x
  2. Step 2: Convert to fraction form
    28,751.88/39,677.28 = 16,005/x
  3. Step 3: Cross multiply
    28,751.88x = 39,677.28 × 16,005
  4. Step 4: Simplify right side
    28,751.88x = 635,034,866.40
  5. Step 5: Solve for x
    x = 635,034,866.40/28,751.88
  6. Step 6: Final answer
    x = 22,086.72

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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.