Home / 7,876.20-11,815.80-2,945.64

Finding the Fourth Proportional to 7,876.20, 11,815.80 and 2,945.64

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Solution

The fourth proportional to 7,876.20, 11,815.80 and 2,945.64 is: 4,419.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.20 : 11,815.80 = 2,945.64 : x
  2. Step 2: Convert to fraction form
    7,876.20/11,815.80 = 2,945.64/x
  3. Step 3: Cross multiply
    7,876.20x = 11,815.80 × 2,945.64
  4. Step 4: Simplify right side
    7,876.20x = 34,805,093.11
  5. Step 5: Solve for x
    x = 34,805,093.11/7,876.20
  6. Step 6: Final answer
    x = 4,419.02

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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.