Home / 19,979.11-27,575.97-12,019.81

Finding the Fourth Proportional to 19,979.11, 27,575.97 and 12,019.81

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Solution

The fourth proportional to 19,979.11, 27,575.97 and 12,019.81 is: 16,590.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.11 : 27,575.97 = 12,019.81 : x
  2. Step 2: Convert to fraction form
    19,979.11/27,575.97 = 12,019.81/x
  3. Step 3: Cross multiply
    19,979.11x = 27,575.97 × 12,019.81
  4. Step 4: Simplify right side
    19,979.11x = 331,457,919.97
  5. Step 5: Solve for x
    x = 331,457,919.97/19,979.11
  6. Step 6: Final answer
    x = 16,590.22

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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.