Home / 20,688.49-28,550.49-11,257.05

Finding the Fourth Proportional to 20,688.49, 28,550.49 and 11,257.05

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Solution

The fourth proportional to 20,688.49, 28,550.49 and 11,257.05 is: 15,534.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.49 : 28,550.49 = 11,257.05 : x
  2. Step 2: Convert to fraction form
    20,688.49/28,550.49 = 11,257.05/x
  3. Step 3: Cross multiply
    20,688.49x = 28,550.49 × 11,257.05
  4. Step 4: Simplify right side
    20,688.49x = 321,394,293.45
  5. Step 5: Solve for x
    x = 321,394,293.45/20,688.49
  6. Step 6: Final answer
    x = 15,534.93

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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.