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Finding the Fourth Proportional to 21,793.42, 32,679.36 and 7,751.36

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Solution

The fourth proportional to 21,793.42, 32,679.36 and 7,751.36 is: 11,623.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,793.42 : 32,679.36 = 7,751.36 : x
  2. Step 2: Convert to fraction form
    21,793.42/32,679.36 = 7,751.36/x
  3. Step 3: Cross multiply
    21,793.42x = 32,679.36 × 7,751.36
  4. Step 4: Simplify right side
    21,793.42x = 253,309,565.63
  5. Step 5: Solve for x
    x = 253,309,565.63/21,793.42
  6. Step 6: Final answer
    x = 11,623.21

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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.