Home / 13,724.78-18,940.70-8,345.66

Finding the Fourth Proportional to 13,724.78, 18,940.70 and 8,345.66

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Solution

The fourth proportional to 13,724.78, 18,940.70 and 8,345.66 is: 11,517.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.78 : 18,940.70 = 8,345.66 : x
  2. Step 2: Convert to fraction form
    13,724.78/18,940.70 = 8,345.66/x
  3. Step 3: Cross multiply
    13,724.78x = 18,940.70 × 8,345.66
  4. Step 4: Simplify right side
    13,724.78x = 158,072,568.52
  5. Step 5: Solve for x
    x = 158,072,568.52/13,724.78
  6. Step 6: Final answer
    x = 11,517.32

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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.