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Finding the Fourth Proportional to 9,919.27, 14,871.61 and 4,728.79

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Solution

The fourth proportional to 9,919.27, 14,871.61 and 4,728.79 is: 7,089.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.27 : 14,871.61 = 4,728.79 : x
  2. Step 2: Convert to fraction form
    9,919.27/14,871.61 = 4,728.79/x
  3. Step 3: Cross multiply
    9,919.27x = 14,871.61 × 4,728.79
  4. Step 4: Simplify right side
    9,919.27x = 70,324,720.65
  5. Step 5: Solve for x
    x = 70,324,720.65/9,919.27
  6. Step 6: Final answer
    x = 7,089.71

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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.