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Finding the Fourth Proportional to 18,220.66, 25,137.21 and 11,134.78

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Solution

The fourth proportional to 18,220.66, 25,137.21 and 11,134.78 is: 15,361.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.66 : 25,137.21 = 11,134.78 : x
  2. Step 2: Convert to fraction form
    18,220.66/25,137.21 = 11,134.78/x
  3. Step 3: Cross multiply
    18,220.66x = 25,137.21 × 11,134.78
  4. Step 4: Simplify right side
    18,220.66x = 279,897,303.16
  5. Step 5: Solve for x
    x = 279,897,303.16/18,220.66
  6. Step 6: Final answer
    x = 15,361.53

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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.