Home / 7,811.76-11,723.40-6,291.12

Finding the Fourth Proportional to 7,811.76, 11,723.40 and 6,291.12

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Solution

The fourth proportional to 7,811.76, 11,723.40 and 6,291.12 is: 9,441.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.76 : 11,723.40 = 6,291.12 : x
  2. Step 2: Convert to fraction form
    7,811.76/11,723.40 = 6,291.12/x
  3. Step 3: Cross multiply
    7,811.76x = 11,723.40 × 6,291.12
  4. Step 4: Simplify right side
    7,811.76x = 73,753,316.21
  5. Step 5: Solve for x
    x = 73,753,316.21/7,811.76
  6. Step 6: Final answer
    x = 9,441.32

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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.