Home / 20,331.38-28,187.12-19,609.68

Finding the Fourth Proportional to 20,331.38, 28,187.12 and 19,609.68

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Solution

The fourth proportional to 20,331.38, 28,187.12 and 19,609.68 is: 27,186.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.38 : 28,187.12 = 19,609.68 : x
  2. Step 2: Convert to fraction form
    20,331.38/28,187.12 = 19,609.68/x
  3. Step 3: Cross multiply
    20,331.38x = 28,187.12 × 19,609.68
  4. Step 4: Simplify right side
    20,331.38x = 552,740,403.32
  5. Step 5: Solve for x
    x = 552,740,403.32/20,331.38
  6. Step 6: Final answer
    x = 27,186.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.