Home / 20,279.40-27,984.62-11,325.12

Finding the Fourth Proportional to 20,279.40, 27,984.62 and 11,325.12

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Solution

The fourth proportional to 20,279.40, 27,984.62 and 11,325.12 is: 15,628.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.40 : 27,984.62 = 11,325.12 : x
  2. Step 2: Convert to fraction form
    20,279.40/27,984.62 = 11,325.12/x
  3. Step 3: Cross multiply
    20,279.40x = 27,984.62 × 11,325.12
  4. Step 4: Simplify right side
    20,279.40x = 316,929,179.65
  5. Step 5: Solve for x
    x = 316,929,179.65/20,279.40
  6. Step 6: Final answer
    x = 15,628.13

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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.