Home / 20,138.92-27,789.71-12,070.44

Finding the Fourth Proportional to 20,138.92, 27,789.71 and 12,070.44

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Solution

The fourth proportional to 20,138.92, 27,789.71 and 12,070.44 is: 16,656.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.92 : 27,789.71 = 12,070.44 : x
  2. Step 2: Convert to fraction form
    20,138.92/27,789.71 = 12,070.44/x
  3. Step 3: Cross multiply
    20,138.92x = 27,789.71 × 12,070.44
  4. Step 4: Simplify right side
    20,138.92x = 335,433,966.82
  5. Step 5: Solve for x
    x = 335,433,966.82/20,138.92
  6. Step 6: Final answer
    x = 16,656.01

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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.