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Finding the Fourth Proportional to 22,281.39, 30,750.12 and 12,724.20

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Solution

The fourth proportional to 22,281.39, 30,750.12 and 12,724.20 is: 17,560.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,281.39 : 30,750.12 = 12,724.20 : x
  2. Step 2: Convert to fraction form
    22,281.39/30,750.12 = 12,724.20/x
  3. Step 3: Cross multiply
    22,281.39x = 30,750.12 × 12,724.20
  4. Step 4: Simplify right side
    22,281.39x = 391,270,676.90
  5. Step 5: Solve for x
    x = 391,270,676.90/22,281.39
  6. Step 6: Final answer
    x = 17,560.42

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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.