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Finding the Fourth Proportional to 7,745.61, 11,619.18 and 2,479.30

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Solution

The fourth proportional to 7,745.61, 11,619.18 and 2,479.30 is: 3,719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,745.61 : 11,619.18 = 2,479.30 : x
  2. Step 2: Convert to fraction form
    7,745.61/11,619.18 = 2,479.30/x
  3. Step 3: Cross multiply
    7,745.61x = 11,619.18 × 2,479.30
  4. Step 4: Simplify right side
    7,745.61x = 28,807,403.93
  5. Step 5: Solve for x
    x = 28,807,403.93/7,745.61
  6. Step 6: Final answer
    x = 3,719.19

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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.