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Finding the Fourth Proportional to 11,759.86, 17,720.70 and 9,725.60

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Solution

The fourth proportional to 11,759.86, 17,720.70 and 9,725.60 is: 14,655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,759.86 : 17,720.70 = 9,725.60 : x
  2. Step 2: Convert to fraction form
    11,759.86/17,720.70 = 9,725.60/x
  3. Step 3: Cross multiply
    11,759.86x = 17,720.70 × 9,725.60
  4. Step 4: Simplify right side
    11,759.86x = 172,344,439.92
  5. Step 5: Solve for x
    x = 172,344,439.92/11,759.86
  6. Step 6: Final answer
    x = 14,655.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.