Home / 20,221.40-30,311.28-7,738.02

Finding the Fourth Proportional to 20,221.40, 30,311.28 and 7,738.02

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Solution

The fourth proportional to 20,221.40, 30,311.28 and 7,738.02 is: 11,599.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.40 : 30,311.28 = 7,738.02 : x
  2. Step 2: Convert to fraction form
    20,221.40/30,311.28 = 7,738.02/x
  3. Step 3: Cross multiply
    20,221.40x = 30,311.28 × 7,738.02
  4. Step 4: Simplify right side
    20,221.40x = 234,549,290.87
  5. Step 5: Solve for x
    x = 234,549,290.87/20,221.40
  6. Step 6: Final answer
    x = 11,599.06

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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.