Home / 28,789.78-39,747.09-20,823.70

Finding the Fourth Proportional to 28,789.78, 39,747.09 and 20,823.70

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Solution

The fourth proportional to 28,789.78, 39,747.09 and 20,823.70 is: 28,749.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,789.78 : 39,747.09 = 20,823.70 : x
  2. Step 2: Convert to fraction form
    28,789.78/39,747.09 = 20,823.70/x
  3. Step 3: Cross multiply
    28,789.78x = 39,747.09 × 20,823.70
  4. Step 4: Simplify right side
    28,789.78x = 827,681,478.03
  5. Step 5: Solve for x
    x = 827,681,478.03/28,789.78
  6. Step 6: Final answer
    x = 28,749.14

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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.