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Finding the Fourth Proportional to 22,191.84, 30,624.84 and 12,120.12

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Solution

The fourth proportional to 22,191.84, 30,624.84 and 12,120.12 is: 16,725.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,191.84 : 30,624.84 = 12,120.12 : x
  2. Step 2: Convert to fraction form
    22,191.84/30,624.84 = 12,120.12/x
  3. Step 3: Cross multiply
    22,191.84x = 30,624.84 × 12,120.12
  4. Step 4: Simplify right side
    22,191.84x = 371,176,735.78
  5. Step 5: Solve for x
    x = 371,176,735.78/22,191.84
  6. Step 6: Final answer
    x = 16,725.82

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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.