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Finding the Fourth Proportional to 18,220.84, 25,145.22 and 11,151.16

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Solution

The fourth proportional to 18,220.84, 25,145.22 and 11,151.16 is: 15,388.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.84 : 25,145.22 = 11,151.16 : x
  2. Step 2: Convert to fraction form
    18,220.84/25,145.22 = 11,151.16/x
  3. Step 3: Cross multiply
    18,220.84x = 25,145.22 × 11,151.16
  4. Step 4: Simplify right side
    18,220.84x = 280,398,371.46
  5. Step 5: Solve for x
    x = 280,398,371.46/18,220.84
  6. Step 6: Final answer
    x = 15,388.88

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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.