Home / 20,845.37-31,271.30-6,991.13

Finding the Fourth Proportional to 20,845.37, 31,271.30 and 6,991.13

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Solution

The fourth proportional to 20,845.37, 31,271.30 and 6,991.13 is: 10,487.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.37 : 31,271.30 = 6,991.13 : x
  2. Step 2: Convert to fraction form
    20,845.37/31,271.30 = 6,991.13/x
  3. Step 3: Cross multiply
    20,845.37x = 31,271.30 × 6,991.13
  4. Step 4: Simplify right side
    20,845.37x = 218,621,532.26
  5. Step 5: Solve for x
    x = 218,621,532.26/20,845.37
  6. Step 6: Final answer
    x = 10,487.78

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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.