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Finding the Fourth Proportional to 7,806.52, 11,709.72 and 3,186.28

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Solution

The fourth proportional to 7,806.52, 11,709.72 and 3,186.28 is: 4,779.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,806.52 : 11,709.72 = 3,186.28 : x
  2. Step 2: Convert to fraction form
    7,806.52/11,709.72 = 3,186.28/x
  3. Step 3: Cross multiply
    7,806.52x = 11,709.72 × 3,186.28
  4. Step 4: Simplify right side
    7,806.52x = 37,310,446.64
  5. Step 5: Solve for x
    x = 37,310,446.64/7,806.52
  6. Step 6: Final answer
    x = 4,779.40

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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.