Home / 18,820.03-28,225.32-7,729.78

Finding the Fourth Proportional to 18,820.03, 28,225.32 and 7,729.78

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Solution

The fourth proportional to 18,820.03, 28,225.32 and 7,729.78 is: 11,592.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.03 : 28,225.32 = 7,729.78 : x
  2. Step 2: Convert to fraction form
    18,820.03/28,225.32 = 7,729.78/x
  3. Step 3: Cross multiply
    18,820.03x = 28,225.32 × 7,729.78
  4. Step 4: Simplify right side
    18,820.03x = 218,175,489.14
  5. Step 5: Solve for x
    x = 218,175,489.14/18,820.03
  6. Step 6: Final answer
    x = 11,592.73

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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.