Home / 20,469.61-28,255.91-15,767.56

Finding the Fourth Proportional to 20,469.61, 28,255.91 and 15,767.56

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Solution

The fourth proportional to 20,469.61, 28,255.91 and 15,767.56 is: 21,765.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,469.61 : 28,255.91 = 15,767.56 : x
  2. Step 2: Convert to fraction form
    20,469.61/28,255.91 = 15,767.56/x
  3. Step 3: Cross multiply
    20,469.61x = 28,255.91 × 15,767.56
  4. Step 4: Simplify right side
    20,469.61x = 445,526,712.76
  5. Step 5: Solve for x
    x = 445,526,712.76/20,469.61
  6. Step 6: Final answer
    x = 21,765.27

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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.