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Finding the Fourth Proportional to 28,892, 39,874.20 and 16,317.56

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Solution

The fourth proportional to 28,892, 39,874.20 and 16,317.56 is: 22,520.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,892 : 39,874.20 = 16,317.56 : x
  2. Step 2: Convert to fraction form
    28,892/39,874.20 = 16,317.56/x
  3. Step 3: Cross multiply
    28,892x = 39,874.20 × 16,317.56
  4. Step 4: Simplify right side
    28,892x = 650,649,650.95
  5. Step 5: Solve for x
    x = 650,649,650.95/28,892
  6. Step 6: Final answer
    x = 22,520.06

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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.