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Finding the Fourth Proportional to 21,799.75, 32,704.49 and 7,948.75

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Solution

The fourth proportional to 21,799.75, 32,704.49 and 7,948.75 is: 11,924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,799.75 : 32,704.49 = 7,948.75 : x
  2. Step 2: Convert to fraction form
    21,799.75/32,704.49 = 7,948.75/x
  3. Step 3: Cross multiply
    21,799.75x = 32,704.49 × 7,948.75
  4. Step 4: Simplify right side
    21,799.75x = 259,959,814.89
  5. Step 5: Solve for x
    x = 259,959,814.89/21,799.75
  6. Step 6: Final answer
    x = 11,924.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.