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Finding the Fourth Proportional to 16,101.72, 22,221 and 9,391.68

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Solution

The fourth proportional to 16,101.72, 22,221 and 9,391.68 is: 12,960.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,101.72 : 22,221 = 9,391.68 : x
  2. Step 2: Convert to fraction form
    16,101.72/22,221 = 9,391.68/x
  3. Step 3: Cross multiply
    16,101.72x = 22,221 × 9,391.68
  4. Step 4: Simplify right side
    16,101.72x = 208,692,521.28
  5. Step 5: Solve for x
    x = 208,692,521.28/16,101.72
  6. Step 6: Final answer
    x = 12,960.88

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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.