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Finding the Fourth Proportional to 38,666.54, 57,990.74 and 21,806.82

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Solution

The fourth proportional to 38,666.54, 57,990.74 and 21,806.82 is: 32,705.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,666.54 : 57,990.74 = 21,806.82 : x
  2. Step 2: Convert to fraction form
    38,666.54/57,990.74 = 21,806.82/x
  3. Step 3: Cross multiply
    38,666.54x = 57,990.74 × 21,806.82
  4. Step 4: Simplify right side
    38,666.54x = 1,264,593,628.85
  5. Step 5: Solve for x
    x = 1,264,593,628.85/38,666.54
  6. Step 6: Final answer
    x = 32,705.11

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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.