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Finding the Fourth Proportional to 12,487.42, 18,749.22 and 7,793.74

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Solution

The fourth proportional to 12,487.42, 18,749.22 and 7,793.74 is: 11,701.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.42 : 18,749.22 = 7,793.74 : x
  2. Step 2: Convert to fraction form
    12,487.42/18,749.22 = 7,793.74/x
  3. Step 3: Cross multiply
    12,487.42x = 18,749.22 × 7,793.74
  4. Step 4: Simplify right side
    12,487.42x = 146,126,545.88
  5. Step 5: Solve for x
    x = 146,126,545.88/12,487.42
  6. Step 6: Final answer
    x = 11,701.90

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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.