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Finding the Fourth Proportional to 21,909.26, 32,865.14 and 7,119.44

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Solution

The fourth proportional to 21,909.26, 32,865.14 and 7,119.44 is: 10,679.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.26 : 32,865.14 = 7,119.44 : x
  2. Step 2: Convert to fraction form
    21,909.26/32,865.14 = 7,119.44/x
  3. Step 3: Cross multiply
    21,909.26x = 32,865.14 × 7,119.44
  4. Step 4: Simplify right side
    21,909.26x = 233,981,392.32
  5. Step 5: Solve for x
    x = 233,981,392.32/21,909.26
  6. Step 6: Final answer
    x = 10,679.57

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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.