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Finding the Fourth Proportional to 7,616.91, 11,415.03 and 4,287.81

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Solution

The fourth proportional to 7,616.91, 11,415.03 and 4,287.81 is: 6,425.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,616.91 : 11,415.03 = 4,287.81 : x
  2. Step 2: Convert to fraction form
    7,616.91/11,415.03 = 4,287.81/x
  3. Step 3: Cross multiply
    7,616.91x = 11,415.03 × 4,287.81
  4. Step 4: Simplify right side
    7,616.91x = 48,945,479.78
  5. Step 5: Solve for x
    x = 48,945,479.78/7,616.91
  6. Step 6: Final answer
    x = 6,425.90

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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.