Home / 20,090.20-27,718.86-11,705.08

Finding the Fourth Proportional to 20,090.20, 27,718.86 and 11,705.08

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Solution

The fourth proportional to 20,090.20, 27,718.86 and 11,705.08 is: 16,149.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.20 : 27,718.86 = 11,705.08 : x
  2. Step 2: Convert to fraction form
    20,090.20/27,718.86 = 11,705.08/x
  3. Step 3: Cross multiply
    20,090.20x = 27,718.86 × 11,705.08
  4. Step 4: Simplify right side
    20,090.20x = 324,451,473.81
  5. Step 5: Solve for x
    x = 324,451,473.81/20,090.20
  6. Step 6: Final answer
    x = 16,149.74

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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.