Home / 20,667.93-31,001.91-8,190.87

Finding the Fourth Proportional to 20,667.93, 31,001.91 and 8,190.87

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Solution

The fourth proportional to 20,667.93, 31,001.91 and 8,190.87 is: 12,286.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.93 : 31,001.91 = 8,190.87 : x
  2. Step 2: Convert to fraction form
    20,667.93/31,001.91 = 8,190.87/x
  3. Step 3: Cross multiply
    20,667.93x = 31,001.91 × 8,190.87
  4. Step 4: Simplify right side
    20,667.93x = 253,932,614.56
  5. Step 5: Solve for x
    x = 253,932,614.56/20,667.93
  6. Step 6: Final answer
    x = 12,286.31

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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.