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Finding the Fourth Proportional to 18,212.54, 27,191.06 and 15,410.78

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Solution

The fourth proportional to 18,212.54, 27,191.06 and 15,410.78 is: 23,008.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.54 : 27,191.06 = 15,410.78 : x
  2. Step 2: Convert to fraction form
    18,212.54/27,191.06 = 15,410.78/x
  3. Step 3: Cross multiply
    18,212.54x = 27,191.06 × 15,410.78
  4. Step 4: Simplify right side
    18,212.54x = 419,035,434.55
  5. Step 5: Solve for x
    x = 419,035,434.55/18,212.54
  6. Step 6: Final answer
    x = 23,008.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.