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Finding the Fourth Proportional to 18,749.72, 28,132.35 and 8,214.30

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Solution

The fourth proportional to 18,749.72, 28,132.35 and 8,214.30 is: 12,324.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,749.72 : 28,132.35 = 8,214.30 : x
  2. Step 2: Convert to fraction form
    18,749.72/28,132.35 = 8,214.30/x
  3. Step 3: Cross multiply
    18,749.72x = 28,132.35 × 8,214.30
  4. Step 4: Simplify right side
    18,749.72x = 231,087,531.80
  5. Step 5: Solve for x
    x = 231,087,531.80/18,749.72
  6. Step 6: Final answer
    x = 12,324.85

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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.