Home / 7,865.28-11,780.90-3,699.05

Finding the Fourth Proportional to 7,865.28, 11,780.90 and 3,699.05

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Solution

The fourth proportional to 7,865.28, 11,780.90 and 3,699.05 is: 5,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,865.28 : 11,780.90 = 3,699.05 : x
  2. Step 2: Convert to fraction form
    7,865.28/11,780.90 = 3,699.05/x
  3. Step 3: Cross multiply
    7,865.28x = 11,780.90 × 3,699.05
  4. Step 4: Simplify right side
    7,865.28x = 43,578,138.15
  5. Step 5: Solve for x
    x = 43,578,138.15/7,865.28
  6. Step 6: Final answer
    x = 5,540.57

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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.