Home / 19,986.42-29,979.49-5,195.28

Finding the Fourth Proportional to 19,986.42, 29,979.49 and 5,195.28

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Solution

The fourth proportional to 19,986.42, 29,979.49 and 5,195.28 is: 7,792.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.42 : 29,979.49 = 5,195.28 : x
  2. Step 2: Convert to fraction form
    19,986.42/29,979.49 = 5,195.28/x
  3. Step 3: Cross multiply
    19,986.42x = 29,979.49 × 5,195.28
  4. Step 4: Simplify right side
    19,986.42x = 155,751,844.81
  5. Step 5: Solve for x
    x = 155,751,844.81/19,986.42
  6. Step 6: Final answer
    x = 7,792.88

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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.