Home / 28,788.78-39,745.71-20,822.70

Finding the Fourth Proportional to 28,788.78, 39,745.71 and 20,822.70

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Solution

The fourth proportional to 28,788.78, 39,745.71 and 20,822.70 is: 28,747.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,788.78 : 39,745.71 = 20,822.70 : x
  2. Step 2: Convert to fraction form
    28,788.78/39,745.71 = 20,822.70/x
  3. Step 3: Cross multiply
    28,788.78x = 39,745.71 × 20,822.70
  4. Step 4: Simplify right side
    28,788.78x = 827,612,995.62
  5. Step 5: Solve for x
    x = 827,612,995.62/28,788.78
  6. Step 6: Final answer
    x = 28,747.76

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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.