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Finding the Fourth Proportional to 7,881.64, 11,811.78 and 4,371.46

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Solution

The fourth proportional to 7,881.64, 11,811.78 and 4,371.46 is: 6,551.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.64 : 11,811.78 = 4,371.46 : x
  2. Step 2: Convert to fraction form
    7,881.64/11,811.78 = 4,371.46/x
  3. Step 3: Cross multiply
    7,881.64x = 11,811.78 × 4,371.46
  4. Step 4: Simplify right side
    7,881.64x = 51,634,723.80
  5. Step 5: Solve for x
    x = 51,634,723.80/7,881.64
  6. Step 6: Final answer
    x = 6,551.27

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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.