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Finding the Fourth Proportional to 6,818.40, 10,234.80 and 3,902.40

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Solution

The fourth proportional to 6,818.40, 10,234.80 and 3,902.40 is: 5,857.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,818.40 : 10,234.80 = 3,902.40 : x
  2. Step 2: Convert to fraction form
    6,818.40/10,234.80 = 3,902.40/x
  3. Step 3: Cross multiply
    6,818.40x = 10,234.80 × 3,902.40
  4. Step 4: Simplify right side
    6,818.40x = 39,940,283.52
  5. Step 5: Solve for x
    x = 39,940,283.52/6,818.40
  6. Step 6: Final answer
    x = 5,857.72

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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.