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Finding the Fourth Proportional to 17,143.72, 25,716.72 and 6,618.76

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Solution

The fourth proportional to 17,143.72, 25,716.72 and 6,618.76 is: 9,928.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,143.72 : 25,716.72 = 6,618.76 : x
  2. Step 2: Convert to fraction form
    17,143.72/25,716.72 = 6,618.76/x
  3. Step 3: Cross multiply
    17,143.72x = 25,716.72 × 6,618.76
  4. Step 4: Simplify right side
    17,143.72x = 170,212,797.67
  5. Step 5: Solve for x
    x = 170,212,797.67/17,143.72
  6. Step 6: Final answer
    x = 9,928.58

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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.