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Finding the Fourth Proportional to 20,108.56, 27,748.56 and 12,146.08

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Solution

The fourth proportional to 20,108.56, 27,748.56 and 12,146.08 is: 16,760.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.56 : 27,748.56 = 12,146.08 : x
  2. Step 2: Convert to fraction form
    20,108.56/27,748.56 = 12,146.08/x
  3. Step 3: Cross multiply
    20,108.56x = 27,748.56 × 12,146.08
  4. Step 4: Simplify right side
    20,108.56x = 337,036,229.64
  5. Step 5: Solve for x
    x = 337,036,229.64/20,108.56
  6. Step 6: Final answer
    x = 16,760.83

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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.