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Finding the Fourth Proportional to 22,376.67, 30,879.90 and 12,305.74

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Solution

The fourth proportional to 22,376.67, 30,879.90 and 12,305.74 is: 16,981.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,376.67 : 30,879.90 = 12,305.74 : x
  2. Step 2: Convert to fraction form
    22,376.67/30,879.90 = 12,305.74/x
  3. Step 3: Cross multiply
    22,376.67x = 30,879.90 × 12,305.74
  4. Step 4: Simplify right side
    22,376.67x = 380,000,020.63
  5. Step 5: Solve for x
    x = 380,000,020.63/22,376.67
  6. Step 6: Final answer
    x = 16,981.97

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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.