Home / 20,087.12-27,720.45-11,134.77

Finding the Fourth Proportional to 20,087.12, 27,720.45 and 11,134.77

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Solution

The fourth proportional to 20,087.12, 27,720.45 and 11,134.77 is: 15,366.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.12 : 27,720.45 = 11,134.77 : x
  2. Step 2: Convert to fraction form
    20,087.12/27,720.45 = 11,134.77/x
  3. Step 3: Cross multiply
    20,087.12x = 27,720.45 × 11,134.77
  4. Step 4: Simplify right side
    20,087.12x = 308,660,835.05
  5. Step 5: Solve for x
    x = 308,660,835.05/20,087.12
  6. Step 6: Final answer
    x = 15,366.11

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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.