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Finding the Fourth Proportional to 20,602.10, 28,431.11 and 12,104.57

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Solution

The fourth proportional to 20,602.10, 28,431.11 and 12,104.57 is: 16,704.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.10 : 28,431.11 = 12,104.57 : x
  2. Step 2: Convert to fraction form
    20,602.10/28,431.11 = 12,104.57/x
  3. Step 3: Cross multiply
    20,602.10x = 28,431.11 × 12,104.57
  4. Step 4: Simplify right side
    20,602.10x = 344,146,158.49
  5. Step 5: Solve for x
    x = 344,146,158.49/20,602.10
  6. Step 6: Final answer
    x = 16,704.43

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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.