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Finding the Fourth Proportional to 8,531.11, 12,779.61 and 6,779.08

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Solution

The fourth proportional to 8,531.11, 12,779.61 and 6,779.08 is: 10,155.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.11 : 12,779.61 = 6,779.08 : x
  2. Step 2: Convert to fraction form
    8,531.11/12,779.61 = 6,779.08/x
  3. Step 3: Cross multiply
    8,531.11x = 12,779.61 × 6,779.08
  4. Step 4: Simplify right side
    8,531.11x = 86,633,998.56
  5. Step 5: Solve for x
    x = 86,633,998.56/8,531.11
  6. Step 6: Final answer
    x = 10,155.07

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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.