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Finding the Fourth Proportional to 21,951.20, 32,905.20 and 10,859.60

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Solution

The fourth proportional to 21,951.20, 32,905.20 and 10,859.60 is: 16,278.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.20 : 32,905.20 = 10,859.60 : x
  2. Step 2: Convert to fraction form
    21,951.20/32,905.20 = 10,859.60/x
  3. Step 3: Cross multiply
    21,951.20x = 32,905.20 × 10,859.60
  4. Step 4: Simplify right side
    21,951.20x = 357,337,309.92
  5. Step 5: Solve for x
    x = 357,337,309.92/21,951.20
  6. Step 6: Final answer
    x = 16,278.71

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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.