Home / 14,239.20-21,310.20-12,489.60

Finding the Fourth Proportional to 14,239.20, 21,310.20 and 12,489.60

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Solution

The fourth proportional to 14,239.20, 21,310.20 and 12,489.60 is: 18,691.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,239.20 : 21,310.20 = 12,489.60 : x
  2. Step 2: Convert to fraction form
    14,239.20/21,310.20 = 12,489.60/x
  3. Step 3: Cross multiply
    14,239.20x = 21,310.20 × 12,489.60
  4. Step 4: Simplify right side
    14,239.20x = 266,155,873.92
  5. Step 5: Solve for x
    x = 266,155,873.92/14,239.20
  6. Step 6: Final answer
    x = 18,691.77

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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.