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Finding the Fourth Proportional to 21,861.66, 32,809.66 and 15,244.78

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Solution

The fourth proportional to 21,861.66, 32,809.66 and 15,244.78 is: 22,879.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.66 : 32,809.66 = 15,244.78 : x
  2. Step 2: Convert to fraction form
    21,861.66/32,809.66 = 15,244.78/x
  3. Step 3: Cross multiply
    21,861.66x = 32,809.66 × 15,244.78
  4. Step 4: Simplify right side
    21,861.66x = 500,176,048.57
  5. Step 5: Solve for x
    x = 500,176,048.57/21,861.66
  6. Step 6: Final answer
    x = 22,879.14

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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.