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Finding the Fourth Proportional to 22,297.20, 30,742.92 and 19,640.40

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Solution

The fourth proportional to 22,297.20, 30,742.92 and 19,640.40 is: 27,079.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,297.20 : 30,742.92 = 19,640.40 : x
  2. Step 2: Convert to fraction form
    22,297.20/30,742.92 = 19,640.40/x
  3. Step 3: Cross multiply
    22,297.20x = 30,742.92 × 19,640.40
  4. Step 4: Simplify right side
    22,297.20x = 603,803,245.97
  5. Step 5: Solve for x
    x = 603,803,245.97/22,297.20
  6. Step 6: Final answer
    x = 27,079.78

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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.