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Finding the Fourth Proportional to 28,859.79, 39,826.31 and 16,112.22

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Solution

The fourth proportional to 28,859.79, 39,826.31 and 16,112.22 is: 22,234.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,859.79 : 39,826.31 = 16,112.22 : x
  2. Step 2: Convert to fraction form
    28,859.79/39,826.31 = 16,112.22/x
  3. Step 3: Cross multiply
    28,859.79x = 39,826.31 × 16,112.22
  4. Step 4: Simplify right side
    28,859.79x = 641,690,187.95
  5. Step 5: Solve for x
    x = 641,690,187.95/28,859.79
  6. Step 6: Final answer
    x = 22,234.75

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1.5x scale

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.