Home / 20,960.91-31,445.22-6,921.89

Finding the Fourth Proportional to 20,960.91, 31,445.22 and 6,921.89

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Solution

The fourth proportional to 20,960.91, 31,445.22 and 6,921.89 is: 10,384.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.91 : 31,445.22 = 6,921.89 : x
  2. Step 2: Convert to fraction form
    20,960.91/31,445.22 = 6,921.89/x
  3. Step 3: Cross multiply
    20,960.91x = 31,445.22 × 6,921.89
  4. Step 4: Simplify right side
    20,960.91x = 217,660,353.87
  5. Step 5: Solve for x
    x = 217,660,353.87/20,960.91
  6. Step 6: Final answer
    x = 10,384.11

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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.