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Finding the Fourth Proportional to 11,751.60, 17,628.48 and 3,431.68

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Solution

The fourth proportional to 11,751.60, 17,628.48 and 3,431.68 is: 5,147.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,751.60 : 17,628.48 = 3,431.68 : x
  2. Step 2: Convert to fraction form
    11,751.60/17,628.48 = 3,431.68/x
  3. Step 3: Cross multiply
    11,751.60x = 17,628.48 × 3,431.68
  4. Step 4: Simplify right side
    11,751.60x = 60,495,302.25
  5. Step 5: Solve for x
    x = 60,495,302.25/11,751.60
  6. Step 6: Final answer
    x = 5,147.84

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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.