Home / 6,811.78-10,215.60-2,428.20

Finding the Fourth Proportional to 6,811.78, 10,215.60 and 2,428.20

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Solution

The fourth proportional to 6,811.78, 10,215.60 and 2,428.20 is: 3,641.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,811.78 : 10,215.60 = 2,428.20 : x
  2. Step 2: Convert to fraction form
    6,811.78/10,215.60 = 2,428.20/x
  3. Step 3: Cross multiply
    6,811.78x = 10,215.60 × 2,428.20
  4. Step 4: Simplify right side
    6,811.78x = 24,805,519.92
  5. Step 5: Solve for x
    x = 24,805,519.92/6,811.78
  6. Step 6: Final answer
    x = 3,641.56

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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.