Home / 5,109.88-7,663.08-1,989.64

Finding the Fourth Proportional to 5,109.88, 7,663.08 and 1,989.64

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Solution

The fourth proportional to 5,109.88, 7,663.08 and 1,989.64 is: 2,983.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.88 : 7,663.08 = 1,989.64 : x
  2. Step 2: Convert to fraction form
    5,109.88/7,663.08 = 1,989.64/x
  3. Step 3: Cross multiply
    5,109.88x = 7,663.08 × 1,989.64
  4. Step 4: Simplify right side
    5,109.88x = 15,246,770.49
  5. Step 5: Solve for x
    x = 15,246,770.49/5,109.88
  6. Step 6: Final answer
    x = 2,983.78

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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.