Home / 20,143.17-27,765.27-13,680.81

Finding the Fourth Proportional to 20,143.17, 27,765.27 and 13,680.81

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Solution

The fourth proportional to 20,143.17, 27,765.27 and 13,680.81 is: 18,857.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.17 : 27,765.27 = 13,680.81 : x
  2. Step 2: Convert to fraction form
    20,143.17/27,765.27 = 13,680.81/x
  3. Step 3: Cross multiply
    20,143.17x = 27,765.27 × 13,680.81
  4. Step 4: Simplify right side
    20,143.17x = 379,851,383.47
  5. Step 5: Solve for x
    x = 379,851,383.47/20,143.17
  6. Step 6: Final answer
    x = 18,857.58

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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.