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Finding the Fourth Proportional to 30,380.70, 45,571.50 and 10,659.42

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Solution

The fourth proportional to 30,380.70, 45,571.50 and 10,659.42 is: 15,989.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,380.70 : 45,571.50 = 10,659.42 : x
  2. Step 2: Convert to fraction form
    30,380.70/45,571.50 = 10,659.42/x
  3. Step 3: Cross multiply
    30,380.70x = 45,571.50 × 10,659.42
  4. Step 4: Simplify right side
    30,380.70x = 485,765,758.53
  5. Step 5: Solve for x
    x = 485,765,758.53/30,380.70
  6. Step 6: Final answer
    x = 15,989.29

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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.