Home / 20,276.63-27,979.11-13,212.62

Finding the Fourth Proportional to 20,276.63, 27,979.11 and 13,212.62

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Solution

The fourth proportional to 20,276.63, 27,979.11 and 13,212.62 is: 18,231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,276.63 : 27,979.11 = 13,212.62 : x
  2. Step 2: Convert to fraction form
    20,276.63/27,979.11 = 13,212.62/x
  3. Step 3: Cross multiply
    20,276.63x = 27,979.11 × 13,212.62
  4. Step 4: Simplify right side
    20,276.63x = 369,677,348.37
  5. Step 5: Solve for x
    x = 369,677,348.37/20,276.63
  6. Step 6: Final answer
    x = 18,231.70

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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.