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Finding the Fourth Proportional to 11,751.48, 17,630.19 and 3,431.34

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Solution

The fourth proportional to 11,751.48, 17,630.19 and 3,431.34 is: 5,147.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,751.48 : 17,630.19 = 3,431.34 : x
  2. Step 2: Convert to fraction form
    11,751.48/17,630.19 = 3,431.34/x
  3. Step 3: Cross multiply
    11,751.48x = 17,630.19 × 3,431.34
  4. Step 4: Simplify right side
    11,751.48x = 60,495,176.15
  5. Step 5: Solve for x
    x = 60,495,176.15/11,751.48
  6. Step 6: Final answer
    x = 5,147.88

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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.