Home / 20,960.20-28,937.40-13,006.81

Finding the Fourth Proportional to 20,960.20, 28,937.40 and 13,006.81

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Solution

The fourth proportional to 20,960.20, 28,937.40 and 13,006.81 is: 17,957.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.20 : 28,937.40 = 13,006.81 : x
  2. Step 2: Convert to fraction form
    20,960.20/28,937.40 = 13,006.81/x
  3. Step 3: Cross multiply
    20,960.20x = 28,937.40 × 13,006.81
  4. Step 4: Simplify right side
    20,960.20x = 376,383,198.66
  5. Step 5: Solve for x
    x = 376,383,198.66/20,960.20
  6. Step 6: Final answer
    x = 17,957.04

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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.