Home / 20,274.90-27,979.35-11,322.39

Finding the Fourth Proportional to 20,274.90, 27,979.35 and 11,322.39

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Solution

The fourth proportional to 20,274.90, 27,979.35 and 11,322.39 is: 15,624.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274.90 : 27,979.35 = 11,322.39 : x
  2. Step 2: Convert to fraction form
    20,274.90/27,979.35 = 11,322.39/x
  3. Step 3: Cross multiply
    20,274.90x = 27,979.35 × 11,322.39
  4. Step 4: Simplify right side
    20,274.90x = 316,793,112.65
  5. Step 5: Solve for x
    x = 316,793,112.65/20,274.90
  6. Step 6: Final answer
    x = 15,624.89

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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.