Home / 28,369.08-39,144.78-15,791.40

Finding the Fourth Proportional to 28,369.08, 39,144.78 and 15,791.40

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Solution

The fourth proportional to 28,369.08, 39,144.78 and 15,791.40 is: 21,789.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.08 : 39,144.78 = 15,791.40 : x
  2. Step 2: Convert to fraction form
    28,369.08/39,144.78 = 15,791.40/x
  3. Step 3: Cross multiply
    28,369.08x = 39,144.78 × 15,791.40
  4. Step 4: Simplify right side
    28,369.08x = 618,150,878.89
  5. Step 5: Solve for x
    x = 618,150,878.89/28,369.08
  6. Step 6: Final answer
    x = 21,789.60

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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.