Home / 20,991.39-31,491.72-6,955.80

Finding the Fourth Proportional to 20,991.39, 31,491.72 and 6,955.80

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Solution

The fourth proportional to 20,991.39, 31,491.72 and 6,955.80 is: 10,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.39 : 31,491.72 = 6,955.80 : x
  2. Step 2: Convert to fraction form
    20,991.39/31,491.72 = 6,955.80/x
  3. Step 3: Cross multiply
    20,991.39x = 31,491.72 × 6,955.80
  4. Step 4: Simplify right side
    20,991.39x = 219,050,105.98
  5. Step 5: Solve for x
    x = 219,050,105.98/20,991.39
  6. Step 6: Final answer
    x = 10,435.24

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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.