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Finding the Fourth Proportional to 18,773.22, 28,111.20 and 14,865.78

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Solution

The fourth proportional to 18,773.22, 28,111.20 and 14,865.78 is: 22,260.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.22 : 28,111.20 = 14,865.78 : x
  2. Step 2: Convert to fraction form
    18,773.22/28,111.20 = 14,865.78/x
  3. Step 3: Cross multiply
    18,773.22x = 28,111.20 × 14,865.78
  4. Step 4: Simplify right side
    18,773.22x = 417,894,914.74
  5. Step 5: Solve for x
    x = 417,894,914.74/18,773.22
  6. Step 6: Final answer
    x = 22,260.16

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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.