Home / 20,959.35-31,408.13-15,669.54

Finding the Fourth Proportional to 20,959.35, 31,408.13 and 15,669.54

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Solution

The fourth proportional to 20,959.35, 31,408.13 and 15,669.54 is: 23,481.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.35 : 31,408.13 = 15,669.54 : x
  2. Step 2: Convert to fraction form
    20,959.35/31,408.13 = 15,669.54/x
  3. Step 3: Cross multiply
    20,959.35x = 31,408.13 × 15,669.54
  4. Step 4: Simplify right side
    20,959.35x = 492,150,949.36
  5. Step 5: Solve for x
    x = 492,150,949.36/20,959.35
  6. Step 6: Final answer
    x = 23,481.21

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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.