Home / 20,081.85-27,712.92-11,129.34

Finding the Fourth Proportional to 20,081.85, 27,712.92 and 11,129.34

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Solution

The fourth proportional to 20,081.85, 27,712.92 and 11,129.34 is: 15,358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.85 : 27,712.92 = 11,129.34 : x
  2. Step 2: Convert to fraction form
    20,081.85/27,712.92 = 11,129.34/x
  3. Step 3: Cross multiply
    20,081.85x = 27,712.92 × 11,129.34
  4. Step 4: Simplify right side
    20,081.85x = 308,426,509.07
  5. Step 5: Solve for x
    x = 308,426,509.07/20,081.85
  6. Step 6: Final answer
    x = 15,358.47

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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.