Home / 20,704.22-28,572-11,272.76

Finding the Fourth Proportional to 20,704.22, 28,572 and 11,272.76

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Solution

The fourth proportional to 20,704.22, 28,572 and 11,272.76 is: 15,556.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.22 : 28,572 = 11,272.76 : x
  2. Step 2: Convert to fraction form
    20,704.22/28,572 = 11,272.76/x
  3. Step 3: Cross multiply
    20,704.22x = 28,572 × 11,272.76
  4. Step 4: Simplify right side
    20,704.22x = 322,085,298.72
  5. Step 5: Solve for x
    x = 322,085,298.72/20,704.22
  6. Step 6: Final answer
    x = 15,556.50

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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.