Home / 20,687.10-31,033.50-6,643.80

Finding the Fourth Proportional to 20,687.10, 31,033.50 and 6,643.80

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Solution

The fourth proportional to 20,687.10, 31,033.50 and 6,643.80 is: 9,966.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.10 : 31,033.50 = 6,643.80 : x
  2. Step 2: Convert to fraction form
    20,687.10/31,033.50 = 6,643.80/x
  3. Step 3: Cross multiply
    20,687.10x = 31,033.50 × 6,643.80
  4. Step 4: Simplify right side
    20,687.10x = 206,180,367.30
  5. Step 5: Solve for x
    x = 206,180,367.30/20,687.10
  6. Step 6: Final answer
    x = 9,966.62

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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.