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Finding the Fourth Proportional to 8,326.40, 12,489.82 and 2,779.54

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Solution

The fourth proportional to 8,326.40, 12,489.82 and 2,779.54 is: 4,169.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,326.40 : 12,489.82 = 2,779.54 : x
  2. Step 2: Convert to fraction form
    8,326.40/12,489.82 = 2,779.54/x
  3. Step 3: Cross multiply
    8,326.40x = 12,489.82 × 2,779.54
  4. Step 4: Simplify right side
    8,326.40x = 34,715,959.05
  5. Step 5: Solve for x
    x = 34,715,959.05/8,326.40
  6. Step 6: Final answer
    x = 4,169.39

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1.5x scale

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.