Home / 6,818.78-10,228.17-2,139.20

Finding the Fourth Proportional to 6,818.78, 10,228.17 and 2,139.20

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Solution

The fourth proportional to 6,818.78, 10,228.17 and 2,139.20 is: 3,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,818.78 : 10,228.17 = 2,139.20 : x
  2. Step 2: Convert to fraction form
    6,818.78/10,228.17 = 2,139.20/x
  3. Step 3: Cross multiply
    6,818.78x = 10,228.17 × 2,139.20
  4. Step 4: Simplify right side
    6,818.78x = 21,880,107.22
  5. Step 5: Solve for x
    x = 21,880,107.22/6,818.78
  6. Step 6: Final answer
    x = 3,208.80

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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.