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Finding the Fourth Proportional to 13,305.81, 19,940.17 and 6,724.31

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Solution

The fourth proportional to 13,305.81, 19,940.17 and 6,724.31 is: 10,077.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.81 : 19,940.17 = 6,724.31 : x
  2. Step 2: Convert to fraction form
    13,305.81/19,940.17 = 6,724.31/x
  3. Step 3: Cross multiply
    13,305.81x = 19,940.17 × 6,724.31
  4. Step 4: Simplify right side
    13,305.81x = 134,083,884.53
  5. Step 5: Solve for x
    x = 134,083,884.53/13,305.81
  6. Step 6: Final answer
    x = 10,077.09

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1.5x scale

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.