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Finding the Fourth Proportional to 12,759.75, 17,603.79 and 7,722.14

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Solution

The fourth proportional to 12,759.75, 17,603.79 and 7,722.14 is: 10,653.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,759.75 : 17,603.79 = 7,722.14 : x
  2. Step 2: Convert to fraction form
    12,759.75/17,603.79 = 7,722.14/x
  3. Step 3: Cross multiply
    12,759.75x = 17,603.79 × 7,722.14
  4. Step 4: Simplify right side
    12,759.75x = 135,938,937.86
  5. Step 5: Solve for x
    x = 135,938,937.86/12,759.75
  6. Step 6: Final answer
    x = 10,653.73

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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.