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Finding the Fourth Proportional to 18,538.86, 27,808.05 and 4,499

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Solution

The fourth proportional to 18,538.86, 27,808.05 and 4,499 is: 6,748.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,538.86 : 27,808.05 = 4,499 : x
  2. Step 2: Convert to fraction form
    18,538.86/27,808.05 = 4,499/x
  3. Step 3: Cross multiply
    18,538.86x = 27,808.05 × 4,499
  4. Step 4: Simplify right side
    18,538.86x = 125,108,428.20
  5. Step 5: Solve for x
    x = 125,108,428.20/18,538.86
  6. Step 6: Final answer
    x = 6,748.44

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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.