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Finding the Fourth Proportional to 22,446.88, 30,805.91 and 20,658.40

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Solution

The fourth proportional to 22,446.88, 30,805.91 and 20,658.40 is: 28,351.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,446.88 : 30,805.91 = 20,658.40 : x
  2. Step 2: Convert to fraction form
    22,446.88/30,805.91 = 20,658.40/x
  3. Step 3: Cross multiply
    22,446.88x = 30,805.91 × 20,658.40
  4. Step 4: Simplify right side
    22,446.88x = 636,400,811.14
  5. Step 5: Solve for x
    x = 636,400,811.14/22,446.88
  6. Step 6: Final answer
    x = 28,351.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.