Home / 20,179.28-27,828.24-12,111.68

Finding the Fourth Proportional to 20,179.28, 27,828.24 and 12,111.68

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Solution

The fourth proportional to 20,179.28, 27,828.24 and 12,111.68 is: 16,702.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179.28 : 27,828.24 = 12,111.68 : x
  2. Step 2: Convert to fraction form
    20,179.28/27,828.24 = 12,111.68/x
  3. Step 3: Cross multiply
    20,179.28x = 27,828.24 × 12,111.68
  4. Step 4: Simplify right side
    20,179.28x = 337,046,737.84
  5. Step 5: Solve for x
    x = 337,046,737.84/20,179.28
  6. Step 6: Final answer
    x = 16,702.61

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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.