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Finding the Fourth Proportional to 7,891.86, 11,835.77 and 2,343.92

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Solution

The fourth proportional to 7,891.86, 11,835.77 and 2,343.92 is: 3,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.86 : 11,835.77 = 2,343.92 : x
  2. Step 2: Convert to fraction form
    7,891.86/11,835.77 = 2,343.92/x
  3. Step 3: Cross multiply
    7,891.86x = 11,835.77 × 2,343.92
  4. Step 4: Simplify right side
    7,891.86x = 27,742,098.02
  5. Step 5: Solve for x
    x = 27,742,098.02/7,891.86
  6. Step 6: Final answer
    x = 3,515.28

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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.