Home / 21,080.43-31,605.27-12,183.21

Finding the Fourth Proportional to 21,080.43, 31,605.27 and 12,183.21

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Solution

The fourth proportional to 21,080.43, 31,605.27 and 12,183.21 is: 18,265.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.43 : 31,605.27 = 12,183.21 : x
  2. Step 2: Convert to fraction form
    21,080.43/31,605.27 = 12,183.21/x
  3. Step 3: Cross multiply
    21,080.43x = 31,605.27 × 12,183.21
  4. Step 4: Simplify right side
    21,080.43x = 385,053,641.52
  5. Step 5: Solve for x
    x = 385,053,641.52/21,080.43
  6. Step 6: Final answer
    x = 18,265.93

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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.