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Finding the Fourth Proportional to 8,993.70, 13,490.55 and 3,147.12

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Solution

The fourth proportional to 8,993.70, 13,490.55 and 3,147.12 is: 4,720.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.70 : 13,490.55 = 3,147.12 : x
  2. Step 2: Convert to fraction form
    8,993.70/13,490.55 = 3,147.12/x
  3. Step 3: Cross multiply
    8,993.70x = 13,490.55 × 3,147.12
  4. Step 4: Simplify right side
    8,993.70x = 42,456,379.72
  5. Step 5: Solve for x
    x = 42,456,379.72/8,993.70
  6. Step 6: Final answer
    x = 4,720.68

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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.