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Finding the Fourth Proportional to 21,456.62, 29,593.82 and 18,799.42

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Solution

The fourth proportional to 21,456.62, 29,593.82 and 18,799.42 is: 25,928.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.62 : 29,593.82 = 18,799.42 : x
  2. Step 2: Convert to fraction form
    21,456.62/29,593.82 = 18,799.42/x
  3. Step 3: Cross multiply
    21,456.62x = 29,593.82 × 18,799.42
  4. Step 4: Simplify right side
    21,456.62x = 556,346,624.60
  5. Step 5: Solve for x
    x = 556,346,624.60/21,456.62
  6. Step 6: Final answer
    x = 25,928.90

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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.