Home / 28,538.78-39,382.62-15,791.19

Finding the Fourth Proportional to 28,538.78, 39,382.62 and 15,791.19

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Solution

The fourth proportional to 28,538.78, 39,382.62 and 15,791.19 is: 21,791.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.78 : 39,382.62 = 15,791.19 : x
  2. Step 2: Convert to fraction form
    28,538.78/39,382.62 = 15,791.19/x
  3. Step 3: Cross multiply
    28,538.78x = 39,382.62 × 15,791.19
  4. Step 4: Simplify right side
    28,538.78x = 621,898,435.12
  5. Step 5: Solve for x
    x = 621,898,435.12/28,538.78
  6. Step 6: Final answer
    x = 21,791.35

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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.