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Finding the Fourth Proportional to 11,437.74, 15,791.22 and 8,779.86

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Solution

The fourth proportional to 11,437.74, 15,791.22 and 8,779.86 is: 12,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,437.74 : 15,791.22 = 8,779.86 : x
  2. Step 2: Convert to fraction form
    11,437.74/15,791.22 = 8,779.86/x
  3. Step 3: Cross multiply
    11,437.74x = 15,791.22 × 8,779.86
  4. Step 4: Simplify right side
    11,437.74x = 138,644,700.83
  5. Step 5: Solve for x
    x = 138,644,700.83/11,437.74
  6. Step 6: Final answer
    x = 12,121.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.