Home / 20,828.39-28,770.75-18,171.18

Finding the Fourth Proportional to 20,828.39, 28,770.75 and 18,171.18

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Solution

The fourth proportional to 20,828.39, 28,770.75 and 18,171.18 is: 25,100.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.39 : 28,770.75 = 18,171.18 : x
  2. Step 2: Convert to fraction form
    20,828.39/28,770.75 = 18,171.18/x
  3. Step 3: Cross multiply
    20,828.39x = 28,770.75 × 18,171.18
  4. Step 4: Simplify right side
    20,828.39x = 522,798,476.99
  5. Step 5: Solve for x
    x = 522,798,476.99/20,828.39
  6. Step 6: Final answer
    x = 25,100.29

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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.