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Finding the Fourth Proportional to 16,221.52, 22,388.04 and 15,220.84

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Solution

The fourth proportional to 16,221.52, 22,388.04 and 15,220.84 is: 21,006.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,221.52 : 22,388.04 = 15,220.84 : x
  2. Step 2: Convert to fraction form
    16,221.52/22,388.04 = 15,220.84/x
  3. Step 3: Cross multiply
    16,221.52x = 22,388.04 × 15,220.84
  4. Step 4: Simplify right side
    16,221.52x = 340,764,774.75
  5. Step 5: Solve for x
    x = 340,764,774.75/16,221.52
  6. Step 6: Final answer
    x = 21,006.96

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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.