Home / 5,108.91-7,663.83-1,989.15

Finding the Fourth Proportional to 5,108.91, 7,663.83 and 1,989.15

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Solution

The fourth proportional to 5,108.91, 7,663.83 and 1,989.15 is: 2,983.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.91 : 7,663.83 = 1,989.15 : x
  2. Step 2: Convert to fraction form
    5,108.91/7,663.83 = 1,989.15/x
  3. Step 3: Cross multiply
    5,108.91x = 7,663.83 × 1,989.15
  4. Step 4: Simplify right side
    5,108.91x = 15,244,507.44
  5. Step 5: Solve for x
    x = 15,244,507.44/5,108.91
  6. Step 6: Final answer
    x = 2,983.91

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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.