Home / 28,857-39,822.66-20,488.08

Finding the Fourth Proportional to 28,857, 39,822.66 and 20,488.08

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Solution

The fourth proportional to 28,857, 39,822.66 and 20,488.08 is: 28,273.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857 : 39,822.66 = 20,488.08 : x
  2. Step 2: Convert to fraction form
    28,857/39,822.66 = 20,488.08/x
  3. Step 3: Cross multiply
    28,857x = 39,822.66 × 20,488.08
  4. Step 4: Simplify right side
    28,857x = 815,889,843.89
  5. Step 5: Solve for x
    x = 815,889,843.89/28,857
  6. Step 6: Final answer
    x = 28,273.55

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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.