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Finding the Fourth Proportional to 22,189.76, 30,621.84 and 12,253.76

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Solution

The fourth proportional to 22,189.76, 30,621.84 and 12,253.76 is: 16,910.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,189.76 : 30,621.84 = 12,253.76 : x
  2. Step 2: Convert to fraction form
    22,189.76/30,621.84 = 12,253.76/x
  3. Step 3: Cross multiply
    22,189.76x = 30,621.84 × 12,253.76
  4. Step 4: Simplify right side
    22,189.76x = 375,232,678.12
  5. Step 5: Solve for x
    x = 375,232,678.12/22,189.76
  6. Step 6: Final answer
    x = 16,910.17

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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.