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Finding the Fourth Proportional to 20,638.63, 30,953.83 and 10,104.11

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Solution

The fourth proportional to 20,638.63, 30,953.83 and 10,104.11 is: 15,154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.63 : 30,953.83 = 10,104.11 : x
  2. Step 2: Convert to fraction form
    20,638.63/30,953.83 = 10,104.11/x
  3. Step 3: Cross multiply
    20,638.63x = 30,953.83 × 10,104.11
  4. Step 4: Simplify right side
    20,638.63x = 312,760,903.24
  5. Step 5: Solve for x
    x = 312,760,903.24/20,638.63
  6. Step 6: Final answer
    x = 15,154.15

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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.