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Finding the Fourth Proportional to 8,993.80, 13,490.70 and 3,149.65

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Solution

The fourth proportional to 8,993.80, 13,490.70 and 3,149.65 is: 4,724.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.80 : 13,490.70 = 3,149.65 : x
  2. Step 2: Convert to fraction form
    8,993.80/13,490.70 = 3,149.65/x
  3. Step 3: Cross multiply
    8,993.80x = 13,490.70 × 3,149.65
  4. Step 4: Simplify right side
    8,993.80x = 42,490,983.26
  5. Step 5: Solve for x
    x = 42,490,983.26/8,993.80
  6. Step 6: Final answer
    x = 4,724.48

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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.