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Finding the Fourth Proportional to 7,643.86, 11,465.80 and 2,713.22

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Solution

The fourth proportional to 7,643.86, 11,465.80 and 2,713.22 is: 4,069.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,643.86 : 11,465.80 = 2,713.22 : x
  2. Step 2: Convert to fraction form
    7,643.86/11,465.80 = 2,713.22/x
  3. Step 3: Cross multiply
    7,643.86x = 11,465.80 × 2,713.22
  4. Step 4: Simplify right side
    7,643.86x = 31,109,237.88
  5. Step 5: Solve for x
    x = 31,109,237.88/7,643.86
  6. Step 6: Final answer
    x = 4,069.83

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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.