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Finding the Fourth Proportional to 18,876, 28,335.84 and 14,720.64

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Solution

The fourth proportional to 18,876, 28,335.84 and 14,720.64 is: 22,097.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876 : 28,335.84 = 14,720.64 : x
  2. Step 2: Convert to fraction form
    18,876/28,335.84 = 14,720.64/x
  3. Step 3: Cross multiply
    18,876x = 28,335.84 × 14,720.64
  4. Step 4: Simplify right side
    18,876x = 417,121,699.74
  5. Step 5: Solve for x
    x = 417,121,699.74/18,876
  6. Step 6: Final answer
    x = 22,097.99

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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.