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Finding the Fourth Proportional to 20,857.05, 27,143.33 and 20,857.05

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Solution

The fourth proportional to 20,857.05, 27,143.33 and 20,857.05 is: 27,143.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.05 : 27,143.33 = 20,857.05 : x
  2. Step 2: Convert to fraction form
    20,857.05/27,143.33 = 20,857.05/x
  3. Step 3: Cross multiply
    20,857.05x = 27,143.33 × 20,857.05
  4. Step 4: Simplify right side
    20,857.05x = 566,129,686.69
  5. Step 5: Solve for x
    x = 566,129,686.69/20,857.05
  6. Step 6: Final answer
    x = 27,143.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.