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Finding the Fourth Proportional to 17,779.86, 26,631.45 and 8,405.73

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Solution

The fourth proportional to 17,779.86, 26,631.45 and 8,405.73 is: 12,590.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,779.86 : 26,631.45 = 8,405.73 : x
  2. Step 2: Convert to fraction form
    17,779.86/26,631.45 = 8,405.73/x
  3. Step 3: Cross multiply
    17,779.86x = 26,631.45 × 8,405.73
  4. Step 4: Simplify right side
    17,779.86x = 223,856,778.21
  5. Step 5: Solve for x
    x = 223,856,778.21/17,779.86
  6. Step 6: Final answer
    x = 12,590.47

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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.