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Finding the Fourth Proportional to 15,175.80, 20,960.10 and 10,131.75

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Solution

The fourth proportional to 15,175.80, 20,960.10 and 10,131.75 is: 13,993.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.80 : 20,960.10 = 10,131.75 : x
  2. Step 2: Convert to fraction form
    15,175.80/20,960.10 = 10,131.75/x
  3. Step 3: Cross multiply
    15,175.80x = 20,960.10 × 10,131.75
  4. Step 4: Simplify right side
    15,175.80x = 212,362,493.18
  5. Step 5: Solve for x
    x = 212,362,493.18/15,175.80
  6. Step 6: Final answer
    x = 13,993.50

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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.