Home / 28,725.03-39,640.89-16,149.78

Finding the Fourth Proportional to 28,725.03, 39,640.89 and 16,149.78

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Solution

The fourth proportional to 28,725.03, 39,640.89 and 16,149.78 is: 22,286.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,725.03 : 39,640.89 = 16,149.78 : x
  2. Step 2: Convert to fraction form
    28,725.03/39,640.89 = 16,149.78/x
  3. Step 3: Cross multiply
    28,725.03x = 39,640.89 × 16,149.78
  4. Step 4: Simplify right side
    28,725.03x = 640,191,713.07
  5. Step 5: Solve for x
    x = 640,191,713.07/28,725.03
  6. Step 6: Final answer
    x = 22,286.89

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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.