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Finding the Fourth Proportional to 7,118.72, 9,826.08 and 4,879.76

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Solution

The fourth proportional to 7,118.72, 9,826.08 and 4,879.76 is: 6,735.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,118.72 : 9,826.08 = 4,879.76 : x
  2. Step 2: Convert to fraction form
    7,118.72/9,826.08 = 4,879.76/x
  3. Step 3: Cross multiply
    7,118.72x = 9,826.08 × 4,879.76
  4. Step 4: Simplify right side
    7,118.72x = 47,948,912.14
  5. Step 5: Solve for x
    x = 47,948,912.14/7,118.72
  6. Step 6: Final answer
    x = 6,735.61

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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.