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Finding the Fourth Proportional to 11,781.36, 17,674.43 and 10,605.05

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Solution

The fourth proportional to 11,781.36, 17,674.43 and 10,605.05 is: 15,909.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.36 : 17,674.43 = 10,605.05 : x
  2. Step 2: Convert to fraction form
    11,781.36/17,674.43 = 10,605.05/x
  3. Step 3: Cross multiply
    11,781.36x = 17,674.43 × 10,605.05
  4. Step 4: Simplify right side
    11,781.36x = 187,438,213.87
  5. Step 5: Solve for x
    x = 187,438,213.87/11,781.36
  6. Step 6: Final answer
    x = 15,909.73

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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.