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Finding the Fourth Proportional to 15,803.26, 21,808.20 and 8,729.52

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Solution

The fourth proportional to 15,803.26, 21,808.20 and 8,729.52 is: 12,046.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.26 : 21,808.20 = 8,729.52 : x
  2. Step 2: Convert to fraction form
    15,803.26/21,808.20 = 8,729.52/x
  3. Step 3: Cross multiply
    15,803.26x = 21,808.20 × 8,729.52
  4. Step 4: Simplify right side
    15,803.26x = 190,375,118.06
  5. Step 5: Solve for x
    x = 190,375,118.06/15,803.26
  6. Step 6: Final answer
    x = 12,046.57

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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.