Home / 20,286.36-27,990.06-11,901.24

Finding the Fourth Proportional to 20,286.36, 27,990.06 and 11,901.24

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Solution

The fourth proportional to 20,286.36, 27,990.06 and 11,901.24 is: 16,420.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.36 : 27,990.06 = 11,901.24 : x
  2. Step 2: Convert to fraction form
    20,286.36/27,990.06 = 11,901.24/x
  3. Step 3: Cross multiply
    20,286.36x = 27,990.06 × 11,901.24
  4. Step 4: Simplify right side
    20,286.36x = 333,116,421.67
  5. Step 5: Solve for x
    x = 333,116,421.67/20,286.36
  6. Step 6: Final answer
    x = 16,420.71

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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.