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Finding the Fourth Proportional to 22,262.39, 30,720.90 and 12,188.90

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Solution

The fourth proportional to 22,262.39, 30,720.90 and 12,188.90 is: 16,820.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,262.39 : 30,720.90 = 12,188.90 : x
  2. Step 2: Convert to fraction form
    22,262.39/30,720.90 = 12,188.90/x
  3. Step 3: Cross multiply
    22,262.39x = 30,720.90 × 12,188.90
  4. Step 4: Simplify right side
    22,262.39x = 374,453,824.41
  5. Step 5: Solve for x
    x = 374,453,824.41/22,262.39
  6. Step 6: Final answer
    x = 16,820.02

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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.