Home / 20,081.40-27,712.55-11,129.07

Finding the Fourth Proportional to 20,081.40, 27,712.55 and 11,129.07

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Solution

The fourth proportional to 20,081.40, 27,712.55 and 11,129.07 is: 15,358.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.40 : 27,712.55 = 11,129.07 : x
  2. Step 2: Convert to fraction form
    20,081.40/27,712.55 = 11,129.07/x
  3. Step 3: Cross multiply
    20,081.40x = 27,712.55 × 11,129.07
  4. Step 4: Simplify right side
    20,081.40x = 308,414,908.83
  5. Step 5: Solve for x
    x = 308,414,908.83/20,081.40
  6. Step 6: Final answer
    x = 15,358.24

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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.