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Finding the Fourth Proportional to 15,175.88, 20,942.79 and 8,461.79

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Solution

The fourth proportional to 15,175.88, 20,942.79 and 8,461.79 is: 11,677.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.88 : 20,942.79 = 8,461.79 : x
  2. Step 2: Convert to fraction form
    15,175.88/20,942.79 = 8,461.79/x
  3. Step 3: Cross multiply
    15,175.88x = 20,942.79 × 8,461.79
  4. Step 4: Simplify right side
    15,175.88x = 177,213,464.82
  5. Step 5: Solve for x
    x = 177,213,464.82/15,175.88
  6. Step 6: Final answer
    x = 11,677.31

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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.