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Finding the Fourth Proportional to 19,662.78, 29,486.34 and 7,179.96

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Solution

The fourth proportional to 19,662.78, 29,486.34 and 7,179.96 is: 10,767.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,662.78 : 29,486.34 = 7,179.96 : x
  2. Step 2: Convert to fraction form
    19,662.78/29,486.34 = 7,179.96/x
  3. Step 3: Cross multiply
    19,662.78x = 29,486.34 × 7,179.96
  4. Step 4: Simplify right side
    19,662.78x = 211,710,741.75
  5. Step 5: Solve for x
    x = 211,710,741.75/19,662.78
  6. Step 6: Final answer
    x = 10,767.08

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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.