Home / 20,644.11-28,479.74-12,255.75

Finding the Fourth Proportional to 20,644.11, 28,479.74 and 12,255.75

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Solution

The fourth proportional to 20,644.11, 28,479.74 and 12,255.75 is: 16,907.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.11 : 28,479.74 = 12,255.75 : x
  2. Step 2: Convert to fraction form
    20,644.11/28,479.74 = 12,255.75/x
  3. Step 3: Cross multiply
    20,644.11x = 28,479.74 × 12,255.75
  4. Step 4: Simplify right side
    20,644.11x = 349,040,512.23
  5. Step 5: Solve for x
    x = 349,040,512.23/20,644.11
  6. Step 6: Final answer
    x = 16,907.51

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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.