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Finding the Fourth Proportional to 22,290.71, 30,761.21 and 12,219.53

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Solution

The fourth proportional to 22,290.71, 30,761.21 and 12,219.53 is: 16,862.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,290.71 : 30,761.21 = 12,219.53 : x
  2. Step 2: Convert to fraction form
    22,290.71/30,761.21 = 12,219.53/x
  3. Step 3: Cross multiply
    22,290.71x = 30,761.21 × 12,219.53
  4. Step 4: Simplify right side
    22,290.71x = 375,887,467.33
  5. Step 5: Solve for x
    x = 375,887,467.33/22,290.71
  6. Step 6: Final answer
    x = 16,862.97

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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.