Home / 15,209.88-20,990.46-8,495.66

Finding the Fourth Proportional to 15,209.88, 20,990.46 and 8,495.66

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Solution

The fourth proportional to 15,209.88, 20,990.46 and 8,495.66 is: 11,724.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.88 : 20,990.46 = 8,495.66 : x
  2. Step 2: Convert to fraction form
    15,209.88/20,990.46 = 8,495.66/x
  3. Step 3: Cross multiply
    15,209.88x = 20,990.46 × 8,495.66
  4. Step 4: Simplify right side
    15,209.88x = 178,327,663.97
  5. Step 5: Solve for x
    x = 178,327,663.97/15,209.88
  6. Step 6: Final answer
    x = 11,724.46

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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.