Home / 19,991.97-29,979.18-10,629.72

Finding the Fourth Proportional to 19,991.97, 29,979.18 and 10,629.72

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Solution

The fourth proportional to 19,991.97, 29,979.18 and 10,629.72 is: 15,939.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.97 : 29,979.18 = 10,629.72 : x
  2. Step 2: Convert to fraction form
    19,991.97/29,979.18 = 10,629.72/x
  3. Step 3: Cross multiply
    19,991.97x = 29,979.18 × 10,629.72
  4. Step 4: Simplify right side
    19,991.97x = 318,670,289.23
  5. Step 5: Solve for x
    x = 318,670,289.23/19,991.97
  6. Step 6: Final answer
    x = 15,939.91

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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.