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Finding the Fourth Proportional to 20,104.10, 30,156.15 and 18,808.10

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Solution

The fourth proportional to 20,104.10, 30,156.15 and 18,808.10 is: 28,212.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,104.10 : 30,156.15 = 18,808.10 : x
  2. Step 2: Convert to fraction form
    20,104.10/30,156.15 = 18,808.10/x
  3. Step 3: Cross multiply
    20,104.10x = 30,156.15 × 18,808.10
  4. Step 4: Simplify right side
    20,104.10x = 567,179,884.82
  5. Step 5: Solve for x
    x = 567,179,884.82/20,104.10
  6. Step 6: Final answer
    x = 28,212.15

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1.5x scale

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.