Home / 31,115.09-42,942.13-19,022.65

Finding the Fourth Proportional to 31,115.09, 42,942.13 and 19,022.65

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Solution

The fourth proportional to 31,115.09, 42,942.13 and 19,022.65 is: 26,253.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.09 : 42,942.13 = 19,022.65 : x
  2. Step 2: Convert to fraction form
    31,115.09/42,942.13 = 19,022.65/x
  3. Step 3: Cross multiply
    31,115.09x = 42,942.13 × 19,022.65
  4. Step 4: Simplify right side
    31,115.09x = 816,873,109.24
  5. Step 5: Solve for x
    x = 816,873,109.24/31,115.09
  6. Step 6: Final answer
    x = 26,253.28

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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.