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Finding the Fourth Proportional to 12,404.26, 18,608.28 and 7,720.48

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Solution

The fourth proportional to 12,404.26, 18,608.28 and 7,720.48 is: 11,581.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,404.26 : 18,608.28 = 7,720.48 : x
  2. Step 2: Convert to fraction form
    12,404.26/18,608.28 = 7,720.48/x
  3. Step 3: Cross multiply
    12,404.26x = 18,608.28 × 7,720.48
  4. Step 4: Simplify right side
    12,404.26x = 143,664,853.57
  5. Step 5: Solve for x
    x = 143,664,853.57/12,404.26
  6. Step 6: Final answer
    x = 11,581.90

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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.