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Finding the Fourth Proportional to 21,762, 30,035.21 and 12,336.03

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Solution

The fourth proportional to 21,762, 30,035.21 and 12,336.03 is: 17,025.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,762 : 30,035.21 = 12,336.03 : x
  2. Step 2: Convert to fraction form
    21,762/30,035.21 = 12,336.03/x
  3. Step 3: Cross multiply
    21,762x = 30,035.21 × 12,336.03
  4. Step 4: Simplify right side
    21,762x = 370,515,189.94
  5. Step 5: Solve for x
    x = 370,515,189.94/21,762
  6. Step 6: Final answer
    x = 17,025.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.