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Finding the Fourth Proportional to 16,221.55, 22,385.75 and 8,769.55

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Solution

The fourth proportional to 16,221.55, 22,385.75 and 8,769.55 is: 12,101.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,221.55 : 22,385.75 = 8,769.55 : x
  2. Step 2: Convert to fraction form
    16,221.55/22,385.75 = 8,769.55/x
  3. Step 3: Cross multiply
    16,221.55x = 22,385.75 × 8,769.55
  4. Step 4: Simplify right side
    16,221.55x = 196,312,910.06
  5. Step 5: Solve for x
    x = 196,312,910.06/16,221.55
  6. Step 6: Final answer
    x = 12,101.98

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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.