Home / 12,356.80-18,540.32-6,518.56

Finding the Fourth Proportional to 12,356.80, 18,540.32 and 6,518.56

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Solution

The fourth proportional to 12,356.80, 18,540.32 and 6,518.56 is: 9,780.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,356.80 : 18,540.32 = 6,518.56 : x
  2. Step 2: Convert to fraction form
    12,356.80/18,540.32 = 6,518.56/x
  3. Step 3: Cross multiply
    12,356.80x = 18,540.32 × 6,518.56
  4. Step 4: Simplify right side
    12,356.80x = 120,856,188.34
  5. Step 5: Solve for x
    x = 120,856,188.34/12,356.80
  6. Step 6: Final answer
    x = 9,780.54

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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.