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Finding the Fourth Proportional to 18,703.38, 28,049.56 and 15,408.30

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Solution

The fourth proportional to 18,703.38, 28,049.56 and 15,408.30 is: 23,107.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.38 : 28,049.56 = 15,408.30 : x
  2. Step 2: Convert to fraction form
    18,703.38/28,049.56 = 15,408.30/x
  3. Step 3: Cross multiply
    18,703.38x = 28,049.56 × 15,408.30
  4. Step 4: Simplify right side
    18,703.38x = 432,196,035.35
  5. Step 5: Solve for x
    x = 432,196,035.35/18,703.38
  6. Step 6: Final answer
    x = 23,107.91

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1.5x scale

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.