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Finding the Fourth Proportional to 7,859.42, 11,773.20 and 3,636.68

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Solution

The fourth proportional to 7,859.42, 11,773.20 and 3,636.68 is: 5,447.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,859.42 : 11,773.20 = 3,636.68 : x
  2. Step 2: Convert to fraction form
    7,859.42/11,773.20 = 3,636.68/x
  3. Step 3: Cross multiply
    7,859.42x = 11,773.20 × 3,636.68
  4. Step 4: Simplify right side
    7,859.42x = 42,815,360.98
  5. Step 5: Solve for x
    x = 42,815,360.98/7,859.42
  6. Step 6: Final answer
    x = 5,447.65

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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.