Home / 20,680.47-28,525.58-12,175.43

Finding the Fourth Proportional to 20,680.47, 28,525.58 and 12,175.43

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Solution

The fourth proportional to 20,680.47, 28,525.58 and 12,175.43 is: 16,794.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.47 : 28,525.58 = 12,175.43 : x
  2. Step 2: Convert to fraction form
    20,680.47/28,525.58 = 12,175.43/x
  3. Step 3: Cross multiply
    20,680.47x = 28,525.58 × 12,175.43
  4. Step 4: Simplify right side
    20,680.47x = 347,310,998.99
  5. Step 5: Solve for x
    x = 347,310,998.99/20,680.47
  6. Step 6: Final answer
    x = 16,794.15

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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.