Home / 20,805.54-31,186.68-13,314.39

Finding the Fourth Proportional to 20,805.54, 31,186.68 and 13,314.39

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Solution

The fourth proportional to 20,805.54, 31,186.68 and 13,314.39 is: 19,957.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.54 : 31,186.68 = 13,314.39 : x
  2. Step 2: Convert to fraction form
    20,805.54/31,186.68 = 13,314.39/x
  3. Step 3: Cross multiply
    20,805.54x = 31,186.68 × 13,314.39
  4. Step 4: Simplify right side
    20,805.54x = 415,231,620.33
  5. Step 5: Solve for x
    x = 415,231,620.33/20,805.54
  6. Step 6: Final answer
    x = 19,957.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.