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Finding the Fourth Proportional to 19,959.78, 29,911.44 and 11,079.02

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Solution

The fourth proportional to 19,959.78, 29,911.44 and 11,079.02 is: 16,602.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,959.78 : 29,911.44 = 11,079.02 : x
  2. Step 2: Convert to fraction form
    19,959.78/29,911.44 = 11,079.02/x
  3. Step 3: Cross multiply
    19,959.78x = 29,911.44 × 11,079.02
  4. Step 4: Simplify right side
    19,959.78x = 331,389,441.99
  5. Step 5: Solve for x
    x = 331,389,441.99/19,959.78
  6. Step 6: Final answer
    x = 16,602.86

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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.