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Finding the Fourth Proportional to 17,145.88, 25,718.82 and 7,278.24

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Solution

The fourth proportional to 17,145.88, 25,718.82 and 7,278.24 is: 10,917.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,145.88 : 25,718.82 = 7,278.24 : x
  2. Step 2: Convert to fraction form
    17,145.88/25,718.82 = 7,278.24/x
  3. Step 3: Cross multiply
    17,145.88x = 25,718.82 × 7,278.24
  4. Step 4: Simplify right side
    17,145.88x = 187,187,615.88
  5. Step 5: Solve for x
    x = 187,187,615.88/17,145.88
  6. Step 6: Final answer
    x = 10,917.36

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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.