Home / 20,085.39-27,719.49-11,135.70

Finding the Fourth Proportional to 20,085.39, 27,719.49 and 11,135.70

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Solution

The fourth proportional to 20,085.39, 27,719.49 and 11,135.70 is: 15,368.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.39 : 27,719.49 = 11,135.70 : x
  2. Step 2: Convert to fraction form
    20,085.39/27,719.49 = 11,135.70/x
  3. Step 3: Cross multiply
    20,085.39x = 27,719.49 × 11,135.70
  4. Step 4: Simplify right side
    20,085.39x = 308,675,786.20
  5. Step 5: Solve for x
    x = 308,675,786.20/20,085.39
  6. Step 6: Final answer
    x = 15,368.18

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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.