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Finding the Fourth Proportional to 19,602.78, 27,049.88 and 11,103.20

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Solution

The fourth proportional to 19,602.78, 27,049.88 and 11,103.20 is: 15,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,602.78 : 27,049.88 = 11,103.20 : x
  2. Step 2: Convert to fraction form
    19,602.78/27,049.88 = 11,103.20/x
  3. Step 3: Cross multiply
    19,602.78x = 27,049.88 × 11,103.20
  4. Step 4: Simplify right side
    19,602.78x = 300,340,036.85
  5. Step 5: Solve for x
    x = 300,340,036.85/19,602.78
  6. Step 6: Final answer
    x = 15,321.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.