Home / 20,138.28-27,790.05-11,186.35

Finding the Fourth Proportional to 20,138.28, 27,790.05 and 11,186.35

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Solution

The fourth proportional to 20,138.28, 27,790.05 and 11,186.35 is: 15,436.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.28 : 27,790.05 = 11,186.35 : x
  2. Step 2: Convert to fraction form
    20,138.28/27,790.05 = 11,186.35/x
  3. Step 3: Cross multiply
    20,138.28x = 27,790.05 × 11,186.35
  4. Step 4: Simplify right side
    20,138.28x = 310,869,295.29
  5. Step 5: Solve for x
    x = 310,869,295.29/20,138.28
  6. Step 6: Final answer
    x = 15,436.74

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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.