Home / 7,790.21-11,685.20-3,627.89

Finding the Fourth Proportional to 7,790.21, 11,685.20 and 3,627.89

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Solution

The fourth proportional to 7,790.21, 11,685.20 and 3,627.89 is: 5,441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,790.21 : 11,685.20 = 3,627.89 : x
  2. Step 2: Convert to fraction form
    7,790.21/11,685.20 = 3,627.89/x
  3. Step 3: Cross multiply
    7,790.21x = 11,685.20 × 3,627.89
  4. Step 4: Simplify right side
    7,790.21x = 42,392,543.66
  5. Step 5: Solve for x
    x = 42,392,543.66/7,790.21
  6. Step 6: Final answer
    x = 5,441.78

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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.