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Finding the Fourth Proportional to 18,774.72, 28,113.48 and 14,867.28

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Solution

The fourth proportional to 18,774.72, 28,113.48 and 14,867.28 is: 22,262.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.72 : 28,113.48 = 14,867.28 : x
  2. Step 2: Convert to fraction form
    18,774.72/28,113.48 = 14,867.28/x
  3. Step 3: Cross multiply
    18,774.72x = 28,113.48 × 14,867.28
  4. Step 4: Simplify right side
    18,774.72x = 417,970,978.93
  5. Step 5: Solve for x
    x = 417,970,978.93/18,774.72
  6. Step 6: Final answer
    x = 22,262.43

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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.