Home / 20,754.56-31,131.88-5,172.19

Finding the Fourth Proportional to 20,754.56, 31,131.88 and 5,172.19

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Solution

The fourth proportional to 20,754.56, 31,131.88 and 5,172.19 is: 7,758.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.56 : 31,131.88 = 5,172.19 : x
  2. Step 2: Convert to fraction form
    20,754.56/31,131.88 = 5,172.19/x
  3. Step 3: Cross multiply
    20,754.56x = 31,131.88 × 5,172.19
  4. Step 4: Simplify right side
    20,754.56x = 161,019,907.66
  5. Step 5: Solve for x
    x = 161,019,907.66/20,754.56
  6. Step 6: Final answer
    x = 7,758.29

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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.