Home / 21,311.91-31,966.70-6,520.82

Finding the Fourth Proportional to 21,311.91, 31,966.70 and 6,520.82

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Solution

The fourth proportional to 21,311.91, 31,966.70 and 6,520.82 is: 9,780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.91 : 31,966.70 = 6,520.82 : x
  2. Step 2: Convert to fraction form
    21,311.91/31,966.70 = 6,520.82/x
  3. Step 3: Cross multiply
    21,311.91x = 31,966.70 × 6,520.82
  4. Step 4: Simplify right side
    21,311.91x = 208,449,096.69
  5. Step 5: Solve for x
    x = 208,449,096.69/21,311.91
  6. Step 6: Final answer
    x = 9,780.87

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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.