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Finding the Fourth Proportional to 22,065.25, 30,450.09 and 12,129.25

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Solution

The fourth proportional to 22,065.25, 30,450.09 and 12,129.25 is: 16,738.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,065.25 : 30,450.09 = 12,129.25 : x
  2. Step 2: Convert to fraction form
    22,065.25/30,450.09 = 12,129.25/x
  3. Step 3: Cross multiply
    22,065.25x = 30,450.09 × 12,129.25
  4. Step 4: Simplify right side
    22,065.25x = 369,336,754.13
  5. Step 5: Solve for x
    x = 369,336,754.13/22,065.25
  6. Step 6: Final answer
    x = 16,738.39

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Half scale
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Double scale
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Similar ratio
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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.