Home / 20,191.19-27,861.20-11,239.07

Finding the Fourth Proportional to 20,191.19, 27,861.20 and 11,239.07

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Solution

The fourth proportional to 20,191.19, 27,861.20 and 11,239.07 is: 15,508.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.19 : 27,861.20 = 11,239.07 : x
  2. Step 2: Convert to fraction form
    20,191.19/27,861.20 = 11,239.07/x
  3. Step 3: Cross multiply
    20,191.19x = 27,861.20 × 11,239.07
  4. Step 4: Simplify right side
    20,191.19x = 313,133,977.08
  5. Step 5: Solve for x
    x = 313,133,977.08/20,191.19
  6. Step 6: Final answer
    x = 15,508.45

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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.