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Finding the Fourth Proportional to 6,920.70, 10,378.84 and 2,239.72

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Solution

The fourth proportional to 6,920.70, 10,378.84 and 2,239.72 is: 3,358.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.70 : 10,378.84 = 2,239.72 : x
  2. Step 2: Convert to fraction form
    6,920.70/10,378.84 = 2,239.72/x
  3. Step 3: Cross multiply
    6,920.70x = 10,378.84 × 2,239.72
  4. Step 4: Simplify right side
    6,920.70x = 23,245,695.52
  5. Step 5: Solve for x
    x = 23,245,695.52/6,920.70
  6. Step 6: Final answer
    x = 3,358.86

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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.