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Finding the Fourth Proportional to 7,811.61, 11,717.01 and 2,880.84

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Solution

The fourth proportional to 7,811.61, 11,717.01 and 2,880.84 is: 4,321.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.61 : 11,717.01 = 2,880.84 : x
  2. Step 2: Convert to fraction form
    7,811.61/11,717.01 = 2,880.84/x
  3. Step 3: Cross multiply
    7,811.61x = 11,717.01 × 2,880.84
  4. Step 4: Simplify right side
    7,811.61x = 33,754,831.09
  5. Step 5: Solve for x
    x = 33,754,831.09/7,811.61
  6. Step 6: Final answer
    x = 4,321.11

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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.