Home / 28,109.52-38,791.92-15,535.04

Finding the Fourth Proportional to 28,109.52, 38,791.92 and 15,535.04

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Solution

The fourth proportional to 28,109.52, 38,791.92 and 15,535.04 is: 21,438.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.52 : 38,791.92 = 15,535.04 : x
  2. Step 2: Convert to fraction form
    28,109.52/38,791.92 = 15,535.04/x
  3. Step 3: Cross multiply
    28,109.52x = 38,791.92 × 15,535.04
  4. Step 4: Simplify right side
    28,109.52x = 602,634,028.88
  5. Step 5: Solve for x
    x = 602,634,028.88/28,109.52
  6. Step 6: Final answer
    x = 21,438.79

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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.