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Finding the Fourth Proportional to 30,357.96, 45,560.49 and 21,063.21

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Solution

The fourth proportional to 30,357.96, 45,560.49 and 21,063.21 is: 31,611.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,357.96 : 45,560.49 = 21,063.21 : x
  2. Step 2: Convert to fraction form
    30,357.96/45,560.49 = 21,063.21/x
  3. Step 3: Cross multiply
    30,357.96x = 45,560.49 × 21,063.21
  4. Step 4: Simplify right side
    30,357.96x = 959,650,168.57
  5. Step 5: Solve for x
    x = 959,650,168.57/30,357.96
  6. Step 6: Final answer
    x = 31,611.15

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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.