Home / 4,990.78-6,886.92-3,105.10

Finding the Fourth Proportional to 4,990.78, 6,886.92 and 3,105.10

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Solution

The fourth proportional to 4,990.78, 6,886.92 and 3,105.10 is: 4,284.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.78 : 6,886.92 = 3,105.10 : x
  2. Step 2: Convert to fraction form
    4,990.78/6,886.92 = 3,105.10/x
  3. Step 3: Cross multiply
    4,990.78x = 6,886.92 × 3,105.10
  4. Step 4: Simplify right side
    4,990.78x = 21,384,575.29
  5. Step 5: Solve for x
    x = 21,384,575.29/4,990.78
  6. Step 6: Final answer
    x = 4,284.82

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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.