Home / 20,427.39-28,189.89-11,477.97

Finding the Fourth Proportional to 20,427.39, 28,189.89 and 11,477.97

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Solution

The fourth proportional to 20,427.39, 28,189.89 and 11,477.97 is: 15,839.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.39 : 28,189.89 = 11,477.97 : x
  2. Step 2: Convert to fraction form
    20,427.39/28,189.89 = 11,477.97/x
  3. Step 3: Cross multiply
    20,427.39x = 28,189.89 × 11,477.97
  4. Step 4: Simplify right side
    20,427.39x = 323,562,711.72
  5. Step 5: Solve for x
    x = 323,562,711.72/20,427.39
  6. Step 6: Final answer
    x = 15,839.65

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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.