Home / 20,088.28-27,722.52-12,128.92

Finding the Fourth Proportional to 20,088.28, 27,722.52 and 12,128.92

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Solution

The fourth proportional to 20,088.28, 27,722.52 and 12,128.92 is: 16,738.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.28 : 27,722.52 = 12,128.92 : x
  2. Step 2: Convert to fraction form
    20,088.28/27,722.52 = 12,128.92/x
  3. Step 3: Cross multiply
    20,088.28x = 27,722.52 × 12,128.92
  4. Step 4: Simplify right side
    20,088.28x = 336,244,227.28
  5. Step 5: Solve for x
    x = 336,244,227.28/20,088.28
  6. Step 6: Final answer
    x = 16,738.33

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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.