Home / 4,992.20-6,885.78-3,129.80

Finding the Fourth Proportional to 4,992.20, 6,885.78 and 3,129.80

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Solution

The fourth proportional to 4,992.20, 6,885.78 and 3,129.80 is: 4,316.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992.20 : 6,885.78 = 3,129.80 : x
  2. Step 2: Convert to fraction form
    4,992.20/6,885.78 = 3,129.80/x
  3. Step 3: Cross multiply
    4,992.20x = 6,885.78 × 3,129.80
  4. Step 4: Simplify right side
    4,992.20x = 21,551,114.24
  5. Step 5: Solve for x
    x = 21,551,114.24/4,992.20
  6. Step 6: Final answer
    x = 4,316.96

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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.