Home / 28,538.88-39,381.96-15,791.28

Finding the Fourth Proportional to 28,538.88, 39,381.96 and 15,791.28

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Solution

The fourth proportional to 28,538.88, 39,381.96 and 15,791.28 is: 21,791.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.88 : 39,381.96 = 15,791.28 : x
  2. Step 2: Convert to fraction form
    28,538.88/39,381.96 = 15,791.28/x
  3. Step 3: Cross multiply
    28,538.88x = 39,381.96 × 15,791.28
  4. Step 4: Simplify right side
    28,538.88x = 621,891,557.31
  5. Step 5: Solve for x
    x = 621,891,557.31/28,538.88
  6. Step 6: Final answer
    x = 21,791.03

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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.