Home / 20,142.54-27,785.52-18,717.08

Finding the Fourth Proportional to 20,142.54, 27,785.52 and 18,717.08

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Solution

The fourth proportional to 20,142.54, 27,785.52 and 18,717.08 is: 25,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.54 : 27,785.52 = 18,717.08 : x
  2. Step 2: Convert to fraction form
    20,142.54/27,785.52 = 18,717.08/x
  3. Step 3: Cross multiply
    20,142.54x = 27,785.52 × 18,717.08
  4. Step 4: Simplify right side
    20,142.54x = 520,063,661.75
  5. Step 5: Solve for x
    x = 520,063,661.75/20,142.54
  6. Step 6: Final answer
    x = 25,819.17

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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.