Home / 20,767.72-28,651.62-13,320.04

Finding the Fourth Proportional to 20,767.72, 28,651.62 and 13,320.04

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Solution

The fourth proportional to 20,767.72, 28,651.62 and 13,320.04 is: 18,376.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.72 : 28,651.62 = 13,320.04 : x
  2. Step 2: Convert to fraction form
    20,767.72/28,651.62 = 13,320.04/x
  3. Step 3: Cross multiply
    20,767.72x = 28,651.62 × 13,320.04
  4. Step 4: Simplify right side
    20,767.72x = 381,640,724.46
  5. Step 5: Solve for x
    x = 381,640,724.46/20,767.72
  6. Step 6: Final answer
    x = 18,376.63

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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.