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Finding the Fourth Proportional to 18,013.31, 27,022.67 and 8,651.57

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Solution

The fourth proportional to 18,013.31, 27,022.67 and 8,651.57 is: 12,978.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,013.31 : 27,022.67 = 8,651.57 : x
  2. Step 2: Convert to fraction form
    18,013.31/27,022.67 = 8,651.57/x
  3. Step 3: Cross multiply
    18,013.31x = 27,022.67 × 8,651.57
  4. Step 4: Simplify right side
    18,013.31x = 233,788,342.72
  5. Step 5: Solve for x
    x = 233,788,342.72/18,013.31
  6. Step 6: Final answer
    x = 12,978.65

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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.