Home / 20,172.91-27,830.98-12,512.64

Finding the Fourth Proportional to 20,172.91, 27,830.98 and 12,512.64

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Solution

The fourth proportional to 20,172.91, 27,830.98 and 12,512.64 is: 17,262.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.91 : 27,830.98 = 12,512.64 : x
  2. Step 2: Convert to fraction form
    20,172.91/27,830.98 = 12,512.64/x
  3. Step 3: Cross multiply
    20,172.91x = 27,830.98 × 12,512.64
  4. Step 4: Simplify right side
    20,172.91x = 348,239,033.59
  5. Step 5: Solve for x
    x = 348,239,033.59/20,172.91
  6. Step 6: Final answer
    x = 17,262.71

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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.