Home / 13,976.78-20,961.64-8,356.06

Finding the Fourth Proportional to 13,976.78, 20,961.64 and 8,356.06

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Solution

The fourth proportional to 13,976.78, 20,961.64 and 8,356.06 is: 12,531.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,976.78 : 20,961.64 = 8,356.06 : x
  2. Step 2: Convert to fraction form
    13,976.78/20,961.64 = 8,356.06/x
  3. Step 3: Cross multiply
    13,976.78x = 20,961.64 × 8,356.06
  4. Step 4: Simplify right side
    13,976.78x = 175,156,721.54
  5. Step 5: Solve for x
    x = 175,156,721.54/13,976.78
  6. Step 6: Final answer
    x = 12,531.98

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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.