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Finding the Fourth Proportional to 12,418.88, 18,628.26 and 3,058.88

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Solution

The fourth proportional to 12,418.88, 18,628.26 and 3,058.88 is: 4,588.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.88 : 18,628.26 = 3,058.88 : x
  2. Step 2: Convert to fraction form
    12,418.88/18,628.26 = 3,058.88/x
  3. Step 3: Cross multiply
    12,418.88x = 18,628.26 × 3,058.88
  4. Step 4: Simplify right side
    12,418.88x = 56,981,611.95
  5. Step 5: Solve for x
    x = 56,981,611.95/12,418.88
  6. Step 6: Final answer
    x = 4,588.31

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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.