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Finding the Fourth Proportional to 28,879.77, 39,854.42 and 16,943.31

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Solution

The fourth proportional to 28,879.77, 39,854.42 and 16,943.31 is: 23,381.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,879.77 : 39,854.42 = 16,943.31 : x
  2. Step 2: Convert to fraction form
    28,879.77/39,854.42 = 16,943.31/x
  3. Step 3: Cross multiply
    28,879.77x = 39,854.42 × 16,943.31
  4. Step 4: Simplify right side
    28,879.77x = 675,265,708.21
  5. Step 5: Solve for x
    x = 675,265,708.21/28,879.77
  6. Step 6: Final answer
    x = 23,381.96

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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.