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Finding the Fourth Proportional to 21,906.81, 32,876.06 and 8,762.85

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Solution

The fourth proportional to 21,906.81, 32,876.06 and 8,762.85 is: 13,150.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.81 : 32,876.06 = 8,762.85 : x
  2. Step 2: Convert to fraction form
    21,906.81/32,876.06 = 8,762.85/x
  3. Step 3: Cross multiply
    21,906.81x = 32,876.06 × 8,762.85
  4. Step 4: Simplify right side
    21,906.81x = 288,087,938.56
  5. Step 5: Solve for x
    x = 288,087,938.56/21,906.81
  6. Step 6: Final answer
    x = 13,150.61

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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.