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Finding the Fourth Proportional to 12,589.56, 17,375.79 and 9,418.74

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Solution

The fourth proportional to 12,589.56, 17,375.79 and 9,418.74 is: 12,999.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,589.56 : 17,375.79 = 9,418.74 : x
  2. Step 2: Convert to fraction form
    12,589.56/17,375.79 = 9,418.74/x
  3. Step 3: Cross multiply
    12,589.56x = 17,375.79 × 9,418.74
  4. Step 4: Simplify right side
    12,589.56x = 163,658,048.30
  5. Step 5: Solve for x
    x = 163,658,048.30/12,589.56
  6. Step 6: Final answer
    x = 12,999.51

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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.