Home / 15,919.20-21,961.68-9,940.49

Finding the Fourth Proportional to 15,919.20, 21,961.68 and 9,940.49

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Solution

The fourth proportional to 15,919.20, 21,961.68 and 9,940.49 is: 13,713.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.20 : 21,961.68 = 9,940.49 : x
  2. Step 2: Convert to fraction form
    15,919.20/21,961.68 = 9,940.49/x
  3. Step 3: Cross multiply
    15,919.20x = 21,961.68 × 9,940.49
  4. Step 4: Simplify right side
    15,919.20x = 218,309,851.61
  5. Step 5: Solve for x
    x = 218,309,851.61/15,919.20
  6. Step 6: Final answer
    x = 13,713.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.