Home / 20,209.76-27,889.03-11,135.39

Finding the Fourth Proportional to 20,209.76, 27,889.03 and 11,135.39

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Solution

The fourth proportional to 20,209.76, 27,889.03 and 11,135.39 is: 15,366.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.76 : 27,889.03 = 11,135.39 : x
  2. Step 2: Convert to fraction form
    20,209.76/27,889.03 = 11,135.39/x
  3. Step 3: Cross multiply
    20,209.76x = 27,889.03 × 11,135.39
  4. Step 4: Simplify right side
    20,209.76x = 310,555,267.66
  5. Step 5: Solve for x
    x = 310,555,267.66/20,209.76
  6. Step 6: Final answer
    x = 15,366.60

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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.