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Finding the Fourth Proportional to 7,863.76, 10,849.71 and 4,879.72

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Solution

The fourth proportional to 7,863.76, 10,849.71 and 4,879.72 is: 6,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,863.76 : 10,849.71 = 4,879.72 : x
  2. Step 2: Convert to fraction form
    7,863.76/10,849.71 = 4,879.72/x
  3. Step 3: Cross multiply
    7,863.76x = 10,849.71 × 4,879.72
  4. Step 4: Simplify right side
    7,863.76x = 52,943,546.88
  5. Step 5: Solve for x
    x = 52,943,546.88/7,863.76
  6. Step 6: Final answer
    x = 6,732.60

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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.