Home / 20,139.30-27,796.68-11,189.88

Finding the Fourth Proportional to 20,139.30, 27,796.68 and 11,189.88

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Solution

The fourth proportional to 20,139.30, 27,796.68 and 11,189.88 is: 15,444.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.30 : 27,796.68 = 11,189.88 : x
  2. Step 2: Convert to fraction form
    20,139.30/27,796.68 = 11,189.88/x
  3. Step 3: Cross multiply
    20,139.30x = 27,796.68 × 11,189.88
  4. Step 4: Simplify right side
    20,139.30x = 311,041,513.60
  5. Step 5: Solve for x
    x = 311,041,513.60/20,139.30
  6. Step 6: Final answer
    x = 15,444.50

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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.