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Finding the Fourth Proportional to 20,902.26, 28,845.02 and 11,342.15

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Solution

The fourth proportional to 20,902.26, 28,845.02 and 11,342.15 is: 15,652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.26 : 28,845.02 = 11,342.15 : x
  2. Step 2: Convert to fraction form
    20,902.26/28,845.02 = 11,342.15/x
  3. Step 3: Cross multiply
    20,902.26x = 28,845.02 × 11,342.15
  4. Step 4: Simplify right side
    20,902.26x = 327,164,342.66
  5. Step 5: Solve for x
    x = 327,164,342.66/20,902.26
  6. Step 6: Final answer
    x = 15,652.10

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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.