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Finding the Fourth Proportional to 8,991.54, 13,480.02 and 3,147.66

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Solution

The fourth proportional to 8,991.54, 13,480.02 and 3,147.66 is: 4,718.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.54 : 13,480.02 = 3,147.66 : x
  2. Step 2: Convert to fraction form
    8,991.54/13,480.02 = 3,147.66/x
  3. Step 3: Cross multiply
    8,991.54x = 13,480.02 × 3,147.66
  4. Step 4: Simplify right side
    8,991.54x = 42,430,519.75
  5. Step 5: Solve for x
    x = 42,430,519.75/8,991.54
  6. Step 6: Final answer
    x = 4,718.94

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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.