Home / 21,179.80-29,168.94-20,720.62

Finding the Fourth Proportional to 21,179.80, 29,168.94 and 20,720.62

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Solution

The fourth proportional to 21,179.80, 29,168.94 and 20,720.62 is: 28,536.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.80 : 29,168.94 = 20,720.62 : x
  2. Step 2: Convert to fraction form
    21,179.80/29,168.94 = 20,720.62/x
  3. Step 3: Cross multiply
    21,179.80x = 29,168.94 × 20,720.62
  4. Step 4: Simplify right side
    21,179.80x = 604,398,521.54
  5. Step 5: Solve for x
    x = 604,398,521.54/21,179.80
  6. Step 6: Final answer
    x = 28,536.55

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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.