Home / 20,921.84-31,383.01-6,131.06

Finding the Fourth Proportional to 20,921.84, 31,383.01 and 6,131.06

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Solution

The fourth proportional to 20,921.84, 31,383.01 and 6,131.06 is: 9,196.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.84 : 31,383.01 = 6,131.06 : x
  2. Step 2: Convert to fraction form
    20,921.84/31,383.01 = 6,131.06/x
  3. Step 3: Cross multiply
    20,921.84x = 31,383.01 × 6,131.06
  4. Step 4: Simplify right side
    20,921.84x = 192,410,960.38
  5. Step 5: Solve for x
    x = 192,410,960.38/20,921.84
  6. Step 6: Final answer
    x = 9,196.66

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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.