Home / 21,080.22-29,089.83-12,121.62

Finding the Fourth Proportional to 21,080.22, 29,089.83 and 12,121.62

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Solution

The fourth proportional to 21,080.22, 29,089.83 and 12,121.62 is: 16,727.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.22 : 29,089.83 = 12,121.62 : x
  2. Step 2: Convert to fraction form
    21,080.22/29,089.83 = 12,121.62/x
  3. Step 3: Cross multiply
    21,080.22x = 29,089.83 × 12,121.62
  4. Step 4: Simplify right side
    21,080.22x = 352,615,865.12
  5. Step 5: Solve for x
    x = 352,615,865.12/21,080.22
  6. Step 6: Final answer
    x = 16,727.33

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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.