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Finding the Fourth Proportional to 8,326.86, 12,490.71 and 2,779.98

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Solution

The fourth proportional to 8,326.86, 12,490.71 and 2,779.98 is: 4,170.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,326.86 : 12,490.71 = 2,779.98 : x
  2. Step 2: Convert to fraction form
    8,326.86/12,490.71 = 2,779.98/x
  3. Step 3: Cross multiply
    8,326.86x = 12,490.71 × 2,779.98
  4. Step 4: Simplify right side
    8,326.86x = 34,723,923.99
  5. Step 5: Solve for x
    x = 34,723,923.99/8,326.86
  6. Step 6: Final answer
    x = 4,170.11

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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.