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Finding the Fourth Proportional to 15,072.10, 20,801.89 and 9,104.63

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Solution

The fourth proportional to 15,072.10, 20,801.89 and 9,104.63 is: 12,565.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.10 : 20,801.89 = 9,104.63 : x
  2. Step 2: Convert to fraction form
    15,072.10/20,801.89 = 9,104.63/x
  3. Step 3: Cross multiply
    15,072.10x = 20,801.89 × 9,104.63
  4. Step 4: Simplify right side
    15,072.10x = 189,393,511.75
  5. Step 5: Solve for x
    x = 189,393,511.75/15,072.10
  6. Step 6: Final answer
    x = 12,565.83

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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.