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Finding the Fourth Proportional to 7,649.70, 11,443.86 and 6,620.89

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Solution

The fourth proportional to 7,649.70, 11,443.86 and 6,620.89 is: 9,904.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,649.70 : 11,443.86 = 6,620.89 : x
  2. Step 2: Convert to fraction form
    7,649.70/11,443.86 = 6,620.89/x
  3. Step 3: Cross multiply
    7,649.70x = 11,443.86 × 6,620.89
  4. Step 4: Simplify right side
    7,649.70x = 75,768,538.24
  5. Step 5: Solve for x
    x = 75,768,538.24/7,649.70
  6. Step 6: Final answer
    x = 9,904.77

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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.