Home / 20,139.20-27,793.62-11,188.29

Finding the Fourth Proportional to 20,139.20, 27,793.62 and 11,188.29

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Solution

The fourth proportional to 20,139.20, 27,793.62 and 11,188.29 is: 15,440.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.20 : 27,793.62 = 11,188.29 : x
  2. Step 2: Convert to fraction form
    20,139.20/27,793.62 = 11,188.29/x
  3. Step 3: Cross multiply
    20,139.20x = 27,793.62 × 11,188.29
  4. Step 4: Simplify right side
    20,139.20x = 310,963,080.71
  5. Step 5: Solve for x
    x = 310,963,080.71/20,139.20
  6. Step 6: Final answer
    x = 15,440.69

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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.