Home / 20,078.28-27,698.94-12,117.96

Finding the Fourth Proportional to 20,078.28, 27,698.94 and 12,117.96

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Solution

The fourth proportional to 20,078.28, 27,698.94 and 12,117.96 is: 16,717.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.28 : 27,698.94 = 12,117.96 : x
  2. Step 2: Convert to fraction form
    20,078.28/27,698.94 = 12,117.96/x
  3. Step 3: Cross multiply
    20,078.28x = 27,698.94 × 12,117.96
  4. Step 4: Simplify right side
    20,078.28x = 335,654,646.96
  5. Step 5: Solve for x
    x = 335,654,646.96/20,078.28
  6. Step 6: Final answer
    x = 16,717.30

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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.