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Finding the Fourth Proportional to 15,172.17, 20,945.01 and 11,761.50

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Solution

The fourth proportional to 15,172.17, 20,945.01 and 11,761.50 is: 16,236.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.17 : 20,945.01 = 11,761.50 : x
  2. Step 2: Convert to fraction form
    15,172.17/20,945.01 = 11,761.50/x
  3. Step 3: Cross multiply
    15,172.17x = 20,945.01 × 11,761.50
  4. Step 4: Simplify right side
    15,172.17x = 246,344,735.12
  5. Step 5: Solve for x
    x = 246,344,735.12/15,172.17
  6. Step 6: Final answer
    x = 16,236.62

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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.