Home / 20,140.66-27,793.32-11,188.72

Finding the Fourth Proportional to 20,140.66, 27,793.32 and 11,188.72

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Solution

The fourth proportional to 20,140.66, 27,793.32 and 11,188.72 is: 15,439.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.66 : 27,793.32 = 11,188.72 : x
  2. Step 2: Convert to fraction form
    20,140.66/27,793.32 = 11,188.72/x
  3. Step 3: Cross multiply
    20,140.66x = 27,793.32 × 11,188.72
  4. Step 4: Simplify right side
    20,140.66x = 310,971,675.35
  5. Step 5: Solve for x
    x = 310,971,675.35/20,140.66
  6. Step 6: Final answer
    x = 15,439.99

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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.