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Finding the Fourth Proportional to 15,215.67, 20,998.71 and 8,844.30

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Solution

The fourth proportional to 15,215.67, 20,998.71 and 8,844.30 is: 12,205.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.67 : 20,998.71 = 8,844.30 : x
  2. Step 2: Convert to fraction form
    15,215.67/20,998.71 = 8,844.30/x
  3. Step 3: Cross multiply
    15,215.67x = 20,998.71 × 8,844.30
  4. Step 4: Simplify right side
    15,215.67x = 185,718,890.85
  5. Step 5: Solve for x
    x = 185,718,890.85/15,215.67
  6. Step 6: Final answer
    x = 12,205.76

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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.