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Finding the Fourth Proportional to 12,895.74, 17,791.02 and 8,418.06

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Solution

The fourth proportional to 12,895.74, 17,791.02 and 8,418.06 is: 11,613.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,895.74 : 17,791.02 = 8,418.06 : x
  2. Step 2: Convert to fraction form
    12,895.74/17,791.02 = 8,418.06/x
  3. Step 3: Cross multiply
    12,895.74x = 17,791.02 × 8,418.06
  4. Step 4: Simplify right side
    12,895.74x = 149,765,873.82
  5. Step 5: Solve for x
    x = 149,765,873.82/12,895.74
  6. Step 6: Final answer
    x = 11,613.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.