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Finding the Fourth Proportional to 6,143.65, 9,216.80 and 1,983.90

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Solution

The fourth proportional to 6,143.65, 9,216.80 and 1,983.90 is: 2,976.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,143.65 : 9,216.80 = 1,983.90 : x
  2. Step 2: Convert to fraction form
    6,143.65/9,216.80 = 1,983.90/x
  3. Step 3: Cross multiply
    6,143.65x = 9,216.80 × 1,983.90
  4. Step 4: Simplify right side
    6,143.65x = 18,285,209.52
  5. Step 5: Solve for x
    x = 18,285,209.52/6,143.65
  6. Step 6: Final answer
    x = 2,976.28

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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.