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Finding the Fourth Proportional to 20,019.81, 30,006.58 and 7,531.86

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Solution

The fourth proportional to 20,019.81, 30,006.58 and 7,531.86 is: 11,289.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019.81 : 30,006.58 = 7,531.86 : x
  2. Step 2: Convert to fraction form
    20,019.81/30,006.58 = 7,531.86/x
  3. Step 3: Cross multiply
    20,019.81x = 30,006.58 × 7,531.86
  4. Step 4: Simplify right side
    20,019.81x = 226,005,361.88
  5. Step 5: Solve for x
    x = 226,005,361.88/20,019.81
  6. Step 6: Final answer
    x = 11,289.09

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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.