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Finding the Fourth Proportional to 17,921.62, 26,882.43 and 8,561.86

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Solution

The fourth proportional to 17,921.62, 26,882.43 and 8,561.86 is: 12,842.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,921.62 : 26,882.43 = 8,561.86 : x
  2. Step 2: Convert to fraction form
    17,921.62/26,882.43 = 8,561.86/x
  3. Step 3: Cross multiply
    17,921.62x = 26,882.43 × 8,561.86
  4. Step 4: Simplify right side
    17,921.62x = 230,163,602.12
  5. Step 5: Solve for x
    x = 230,163,602.12/17,921.62
  6. Step 6: Final answer
    x = 12,842.79

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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.