Home / 20,960.96-31,441.84-16,781.56

Finding the Fourth Proportional to 20,960.96, 31,441.84 and 16,781.56

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Solution

The fourth proportional to 20,960.96, 31,441.84 and 16,781.56 is: 25,172.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.96 : 31,441.84 = 16,781.56 : x
  2. Step 2: Convert to fraction form
    20,960.96/31,441.84 = 16,781.56/x
  3. Step 3: Cross multiply
    20,960.96x = 31,441.84 × 16,781.56
  4. Step 4: Simplify right side
    20,960.96x = 527,643,124.47
  5. Step 5: Solve for x
    x = 527,643,124.47/20,960.96
  6. Step 6: Final answer
    x = 25,172.66

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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.