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Finding the Fourth Proportional to 20,172.95, 27,835.95 and 11,219.31

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Solution

The fourth proportional to 20,172.95, 27,835.95 and 11,219.31 is: 15,481.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.95 : 27,835.95 = 11,219.31 : x
  2. Step 2: Convert to fraction form
    20,172.95/27,835.95 = 11,219.31/x
  3. Step 3: Cross multiply
    20,172.95x = 27,835.95 × 11,219.31
  4. Step 4: Simplify right side
    20,172.95x = 312,300,194.27
  5. Step 5: Solve for x
    x = 312,300,194.27/20,172.95
  6. Step 6: Final answer
    x = 15,481.14

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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.