Home / 7,649.20-11,443.11-6,620.40

Finding the Fourth Proportional to 7,649.20, 11,443.11 and 6,620.40

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Solution

The fourth proportional to 7,649.20, 11,443.11 and 6,620.40 is: 9,904.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,649.20 : 11,443.11 = 6,620.40 : x
  2. Step 2: Convert to fraction form
    7,649.20/11,443.11 = 6,620.40/x
  3. Step 3: Cross multiply
    7,649.20x = 11,443.11 × 6,620.40
  4. Step 4: Simplify right side
    7,649.20x = 75,757,908.23
  5. Step 5: Solve for x
    x = 75,757,908.23/7,649.20
  6. Step 6: Final answer
    x = 9,904.04

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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.