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Finding the Fourth Proportional to 20,637.38, 30,956.49 and 6,786.38

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Solution

The fourth proportional to 20,637.38, 30,956.49 and 6,786.38 is: 10,179.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.38 : 30,956.49 = 6,786.38 : x
  2. Step 2: Convert to fraction form
    20,637.38/30,956.49 = 6,786.38/x
  3. Step 3: Cross multiply
    20,637.38x = 30,956.49 × 6,786.38
  4. Step 4: Simplify right side
    20,637.38x = 210,082,349.82
  5. Step 5: Solve for x
    x = 210,082,349.82/20,637.38
  6. Step 6: Final answer
    x = 10,179.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.