Home / 18,769.86-28,115.79-8,916.90

Finding the Fourth Proportional to 18,769.86, 28,115.79 and 8,916.90

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Solution

The fourth proportional to 18,769.86, 28,115.79 and 8,916.90 is: 13,356.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769.86 : 28,115.79 = 8,916.90 : x
  2. Step 2: Convert to fraction form
    18,769.86/28,115.79 = 8,916.90/x
  3. Step 3: Cross multiply
    18,769.86x = 28,115.79 × 8,916.90
  4. Step 4: Simplify right side
    18,769.86x = 250,705,687.85
  5. Step 5: Solve for x
    x = 250,705,687.85/18,769.86
  6. Step 6: Final answer
    x = 13,356.82

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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.