Home / 20,778.54-31,308.06-17,161.78

Finding the Fourth Proportional to 20,778.54, 31,308.06 and 17,161.78

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Solution

The fourth proportional to 20,778.54, 31,308.06 and 17,161.78 is: 25,858.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.54 : 31,308.06 = 17,161.78 : x
  2. Step 2: Convert to fraction form
    20,778.54/31,308.06 = 17,161.78/x
  3. Step 3: Cross multiply
    20,778.54x = 31,308.06 × 17,161.78
  4. Step 4: Simplify right side
    20,778.54x = 537,302,037.95
  5. Step 5: Solve for x
    x = 537,302,037.95/20,778.54
  6. Step 6: Final answer
    x = 25,858.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.