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Finding the Fourth Proportional to 18,447.78, 27,678.65 and 11,057.55

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Solution

The fourth proportional to 18,447.78, 27,678.65 and 11,057.55 is: 16,590.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,447.78 : 27,678.65 = 11,057.55 : x
  2. Step 2: Convert to fraction form
    18,447.78/27,678.65 = 11,057.55/x
  3. Step 3: Cross multiply
    18,447.78x = 27,678.65 × 11,057.55
  4. Step 4: Simplify right side
    18,447.78x = 306,058,056.31
  5. Step 5: Solve for x
    x = 306,058,056.31/18,447.78
  6. Step 6: Final answer
    x = 16,590.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.