Home / 20,297.88-30,449.28-7,147.56

Finding the Fourth Proportional to 20,297.88, 30,449.28 and 7,147.56

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Solution

The fourth proportional to 20,297.88, 30,449.28 and 7,147.56 is: 10,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,297.88 : 30,449.28 = 7,147.56 : x
  2. Step 2: Convert to fraction form
    20,297.88/30,449.28 = 7,147.56/x
  3. Step 3: Cross multiply
    20,297.88x = 30,449.28 × 7,147.56
  4. Step 4: Simplify right side
    20,297.88x = 217,638,055.76
  5. Step 5: Solve for x
    x = 217,638,055.76/20,297.88
  6. Step 6: Final answer
    x = 10,722.21

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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.