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Finding the Fourth Proportional to 7,881.16, 11,824.44 and 2,690.68

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Solution

The fourth proportional to 7,881.16, 11,824.44 and 2,690.68 is: 4,036.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.16 : 11,824.44 = 2,690.68 : x
  2. Step 2: Convert to fraction form
    7,881.16/11,824.44 = 2,690.68/x
  3. Step 3: Cross multiply
    7,881.16x = 11,824.44 × 2,690.68
  4. Step 4: Simplify right side
    7,881.16x = 31,815,784.22
  5. Step 5: Solve for x
    x = 31,815,784.22/7,881.16
  6. Step 6: Final answer
    x = 4,036.94

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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.