Home / 28,790.28-39,747.78-20,824.20

Finding the Fourth Proportional to 28,790.28, 39,747.78 and 20,824.20

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Solution

The fourth proportional to 28,790.28, 39,747.78 and 20,824.20 is: 28,749.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,790.28 : 39,747.78 = 20,824.20 : x
  2. Step 2: Convert to fraction form
    28,790.28/39,747.78 = 20,824.20/x
  3. Step 3: Cross multiply
    28,790.28x = 39,747.78 × 20,824.20
  4. Step 4: Simplify right side
    28,790.28x = 827,715,720.28
  5. Step 5: Solve for x
    x = 827,715,720.28/28,790.28
  6. Step 6: Final answer
    x = 28,749.83

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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.