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Finding the Fourth Proportional to 30,611.55, 45,919.53 and 12,824.34

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Solution

The fourth proportional to 30,611.55, 45,919.53 and 12,824.34 is: 19,237.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.55 : 45,919.53 = 12,824.34 : x
  2. Step 2: Convert to fraction form
    30,611.55/45,919.53 = 12,824.34/x
  3. Step 3: Cross multiply
    30,611.55x = 45,919.53 × 12,824.34
  4. Step 4: Simplify right side
    30,611.55x = 588,887,665.36
  5. Step 5: Solve for x
    x = 588,887,665.36/30,611.55
  6. Step 6: Final answer
    x = 19,237.43

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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.