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Finding the Fourth Proportional to 22,262.40, 30,721.40 and 12,190.58

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Solution

The fourth proportional to 22,262.40, 30,721.40 and 12,190.58 is: 16,822.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,262.40 : 30,721.40 = 12,190.58 : x
  2. Step 2: Convert to fraction form
    22,262.40/30,721.40 = 12,190.58/x
  3. Step 3: Cross multiply
    22,262.40x = 30,721.40 × 12,190.58
  4. Step 4: Simplify right side
    22,262.40x = 374,511,684.41
  5. Step 5: Solve for x
    x = 374,511,684.41/22,262.40
  6. Step 6: Final answer
    x = 16,822.61

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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.