Home / 20,422.15-30,625.28-7,940.52

Finding the Fourth Proportional to 20,422.15, 30,625.28 and 7,940.52

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Solution

The fourth proportional to 20,422.15, 30,625.28 and 7,940.52 is: 11,907.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.15 : 30,625.28 = 7,940.52 : x
  2. Step 2: Convert to fraction form
    20,422.15/30,625.28 = 7,940.52/x
  3. Step 3: Cross multiply
    20,422.15x = 30,625.28 × 7,940.52
  4. Step 4: Simplify right side
    20,422.15x = 243,180,648.35
  5. Step 5: Solve for x
    x = 243,180,648.35/20,422.15
  6. Step 6: Final answer
    x = 11,907.69

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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.