Home / 20,081.40-27,712.50-11,129.05

Finding the Fourth Proportional to 20,081.40, 27,712.50 and 11,129.05

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Solution

The fourth proportional to 20,081.40, 27,712.50 and 11,129.05 is: 15,358.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.40 : 27,712.50 = 11,129.05 : x
  2. Step 2: Convert to fraction form
    20,081.40/27,712.50 = 11,129.05/x
  3. Step 3: Cross multiply
    20,081.40x = 27,712.50 × 11,129.05
  4. Step 4: Simplify right side
    20,081.40x = 308,413,798.13
  5. Step 5: Solve for x
    x = 308,413,798.13/20,081.40
  6. Step 6: Final answer
    x = 15,358.18

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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.