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Finding the Fourth Proportional to 22,354.91, 30,879.62 and 15,662.69

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Solution

The fourth proportional to 22,354.91, 30,879.62 and 15,662.69 is: 21,635.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,354.91 : 30,879.62 = 15,662.69 : x
  2. Step 2: Convert to fraction form
    22,354.91/30,879.62 = 15,662.69/x
  3. Step 3: Cross multiply
    22,354.91x = 30,879.62 × 15,662.69
  4. Step 4: Simplify right side
    22,354.91x = 483,657,915.38
  5. Step 5: Solve for x
    x = 483,657,915.38/22,354.91
  6. Step 6: Final answer
    x = 21,635.42

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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.