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Finding the Fourth Proportional to 18,775.28, 25,908.09 and 11,220.11

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Solution

The fourth proportional to 18,775.28, 25,908.09 and 11,220.11 is: 15,482.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.28 : 25,908.09 = 11,220.11 : x
  2. Step 2: Convert to fraction form
    18,775.28/25,908.09 = 11,220.11/x
  3. Step 3: Cross multiply
    18,775.28x = 25,908.09 × 11,220.11
  4. Step 4: Simplify right side
    18,775.28x = 290,691,490.15
  5. Step 5: Solve for x
    x = 290,691,490.15/18,775.28
  6. Step 6: Final answer
    x = 15,482.68

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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.