Home / 20,979.74-28,951.19-12,021.02

Finding the Fourth Proportional to 20,979.74, 28,951.19 and 12,021.02

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Solution

The fourth proportional to 20,979.74, 28,951.19 and 12,021.02 is: 16,588.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.74 : 28,951.19 = 12,021.02 : x
  2. Step 2: Convert to fraction form
    20,979.74/28,951.19 = 12,021.02/x
  3. Step 3: Cross multiply
    20,979.74x = 28,951.19 × 12,021.02
  4. Step 4: Simplify right side
    20,979.74x = 348,022,659.21
  5. Step 5: Solve for x
    x = 348,022,659.21/20,979.74
  6. Step 6: Final answer
    x = 16,588.51

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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.