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Finding the Fourth Proportional to 15,215.17, 20,998.02 and 8,843.80

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Solution

The fourth proportional to 15,215.17, 20,998.02 and 8,843.80 is: 12,205.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.17 : 20,998.02 = 8,843.80 : x
  2. Step 2: Convert to fraction form
    15,215.17/20,998.02 = 8,843.80/x
  3. Step 3: Cross multiply
    15,215.17x = 20,998.02 × 8,843.80
  4. Step 4: Simplify right side
    15,215.17x = 185,702,289.28
  5. Step 5: Solve for x
    x = 185,702,289.28/15,215.17
  6. Step 6: Final answer
    x = 12,205.07

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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.