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Finding the Fourth Proportional to 15,150.90, 20,906.85 and 11,174.20

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Solution

The fourth proportional to 15,150.90, 20,906.85 and 11,174.20 is: 15,419.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,150.90 : 20,906.85 = 11,174.20 : x
  2. Step 2: Convert to fraction form
    15,150.90/20,906.85 = 11,174.20/x
  3. Step 3: Cross multiply
    15,150.90x = 20,906.85 × 11,174.20
  4. Step 4: Simplify right side
    15,150.90x = 233,617,323.27
  5. Step 5: Solve for x
    x = 233,617,323.27/15,150.90
  6. Step 6: Final answer
    x = 15,419.37

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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.