Home / 20,688.66-28,550.22-11,257.26

Finding the Fourth Proportional to 20,688.66, 28,550.22 and 11,257.26

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Solution

The fourth proportional to 20,688.66, 28,550.22 and 11,257.26 is: 15,534.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.66 : 28,550.22 = 11,257.26 : x
  2. Step 2: Convert to fraction form
    20,688.66/28,550.22 = 11,257.26/x
  3. Step 3: Cross multiply
    20,688.66x = 28,550.22 × 11,257.26
  4. Step 4: Simplify right side
    20,688.66x = 321,397,249.60
  5. Step 5: Solve for x
    x = 321,397,249.60/20,688.66
  6. Step 6: Final answer
    x = 15,534.95

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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.