Home / 20,991.98-31,475.97-8,518.06

Finding the Fourth Proportional to 20,991.98, 31,475.97 and 8,518.06

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Solution

The fourth proportional to 20,991.98, 31,475.97 and 8,518.06 is: 12,772.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.98 : 31,475.97 = 8,518.06 : x
  2. Step 2: Convert to fraction form
    20,991.98/31,475.97 = 8,518.06/x
  3. Step 3: Cross multiply
    20,991.98x = 31,475.97 × 8,518.06
  4. Step 4: Simplify right side
    20,991.98x = 268,114,201.02
  5. Step 5: Solve for x
    x = 268,114,201.02/20,991.98
  6. Step 6: Final answer
    x = 12,772.22

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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.