Home / 20,824.88-31,240.56-6,781.59

Finding the Fourth Proportional to 20,824.88, 31,240.56 and 6,781.59

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Solution

The fourth proportional to 20,824.88, 31,240.56 and 6,781.59 is: 10,173.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.88 : 31,240.56 = 6,781.59 : x
  2. Step 2: Convert to fraction form
    20,824.88/31,240.56 = 6,781.59/x
  3. Step 3: Cross multiply
    20,824.88x = 31,240.56 × 6,781.59
  4. Step 4: Simplify right side
    20,824.88x = 211,860,694.72
  5. Step 5: Solve for x
    x = 211,860,694.72/20,824.88
  6. Step 6: Final answer
    x = 10,173.44

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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.