Home / 21,961.20-32,920.20-10,869.60

Finding the Fourth Proportional to 21,961.20, 32,920.20 and 10,869.60

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Solution

The fourth proportional to 21,961.20, 32,920.20 and 10,869.60 is: 16,293.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.20 : 32,920.20 = 10,869.60 : x
  2. Step 2: Convert to fraction form
    21,961.20/32,920.20 = 10,869.60/x
  3. Step 3: Cross multiply
    21,961.20x = 32,920.20 × 10,869.60
  4. Step 4: Simplify right side
    21,961.20x = 357,829,405.92
  5. Step 5: Solve for x
    x = 357,829,405.92/21,961.20
  6. Step 6: Final answer
    x = 16,293.71

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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.