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Finding the Fourth Proportional to 43,611.16, 65,420.72 and 14,021.68

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Solution

The fourth proportional to 43,611.16, 65,420.72 and 14,021.68 is: 21,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,611.16 : 65,420.72 = 14,021.68 : x
  2. Step 2: Convert to fraction form
    43,611.16/65,420.72 = 14,021.68/x
  3. Step 3: Cross multiply
    43,611.16x = 65,420.72 × 14,021.68
  4. Step 4: Simplify right side
    43,611.16x = 917,308,401.21
  5. Step 5: Solve for x
    x = 917,308,401.21/43,611.16
  6. Step 6: Final answer
    x = 21,033.80

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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.