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Finding the Fourth Proportional to 18,170.91, 27,221.81 and 10,356.03

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Solution

The fourth proportional to 18,170.91, 27,221.81 and 10,356.03 is: 15,514.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,170.91 : 27,221.81 = 10,356.03 : x
  2. Step 2: Convert to fraction form
    18,170.91/27,221.81 = 10,356.03/x
  3. Step 3: Cross multiply
    18,170.91x = 27,221.81 × 10,356.03
  4. Step 4: Simplify right side
    18,170.91x = 281,909,829.23
  5. Step 5: Solve for x
    x = 281,909,829.23/18,170.91
  6. Step 6: Final answer
    x = 15,514.35

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1.5x scale

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.