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Finding the Fourth Proportional to 7,866.72, 10,855.99 and 4,329.86

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Solution

The fourth proportional to 7,866.72, 10,855.99 and 4,329.86 is: 5,975.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,866.72 : 10,855.99 = 4,329.86 : x
  2. Step 2: Convert to fraction form
    7,866.72/10,855.99 = 4,329.86/x
  3. Step 3: Cross multiply
    7,866.72x = 10,855.99 × 4,329.86
  4. Step 4: Simplify right side
    7,866.72x = 47,004,867.99
  5. Step 5: Solve for x
    x = 47,004,867.99/7,866.72
  6. Step 6: Final answer
    x = 5,975.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.