Home / 13,753.89-18,979.38-7,786.23

Finding the Fourth Proportional to 13,753.89, 18,979.38 and 7,786.23

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Solution

The fourth proportional to 13,753.89, 18,979.38 and 7,786.23 is: 10,744.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.89 : 18,979.38 = 7,786.23 : x
  2. Step 2: Convert to fraction form
    13,753.89/18,979.38 = 7,786.23/x
  3. Step 3: Cross multiply
    13,753.89x = 18,979.38 × 7,786.23
  4. Step 4: Simplify right side
    13,753.89x = 147,777,817.94
  5. Step 5: Solve for x
    x = 147,777,817.94/13,753.89
  6. Step 6: Final answer
    x = 10,744.44

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Double scale
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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.