Home / 20,578.75-28,398.09-12,080.73

Finding the Fourth Proportional to 20,578.75, 28,398.09 and 12,080.73

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Solution

The fourth proportional to 20,578.75, 28,398.09 and 12,080.73 is: 16,671.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.75 : 28,398.09 = 12,080.73 : x
  2. Step 2: Convert to fraction form
    20,578.75/28,398.09 = 12,080.73/x
  3. Step 3: Cross multiply
    20,578.75x = 28,398.09 × 12,080.73
  4. Step 4: Simplify right side
    20,578.75x = 343,069,668.40
  5. Step 5: Solve for x
    x = 343,069,668.40/20,578.75
  6. Step 6: Final answer
    x = 16,671.07

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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.