Home / 20,688.67-28,550.37-11,257.23

Finding the Fourth Proportional to 20,688.67, 28,550.37 and 11,257.23

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Solution

The fourth proportional to 20,688.67, 28,550.37 and 11,257.23 is: 15,534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.67 : 28,550.37 = 11,257.23 : x
  2. Step 2: Convert to fraction form
    20,688.67/28,550.37 = 11,257.23/x
  3. Step 3: Cross multiply
    20,688.67x = 28,550.37 × 11,257.23
  4. Step 4: Simplify right side
    20,688.67x = 321,398,081.68
  5. Step 5: Solve for x
    x = 321,398,081.68/20,688.67
  6. Step 6: Final answer
    x = 15,534.98

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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.