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Finding the Fourth Proportional to 19,881.88, 29,816.44 and 8,788.32

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Solution

The fourth proportional to 19,881.88, 29,816.44 and 8,788.32 is: 13,179.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.88 : 29,816.44 = 8,788.32 : x
  2. Step 2: Convert to fraction form
    19,881.88/29,816.44 = 8,788.32/x
  3. Step 3: Cross multiply
    19,881.88x = 29,816.44 × 8,788.32
  4. Step 4: Simplify right side
    19,881.88x = 262,036,415.98
  5. Step 5: Solve for x
    x = 262,036,415.98/19,881.88
  6. Step 6: Final answer
    x = 13,179.66

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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.