Home / 43,405.47-65,021.94-21,153.96

Finding the Fourth Proportional to 43,405.47, 65,021.94 and 21,153.96

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Solution

The fourth proportional to 43,405.47, 65,021.94 and 21,153.96 is: 31,688.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,405.47 : 65,021.94 = 21,153.96 : x
  2. Step 2: Convert to fraction form
    43,405.47/65,021.94 = 21,153.96/x
  3. Step 3: Cross multiply
    43,405.47x = 65,021.94 × 21,153.96
  4. Step 4: Simplify right side
    43,405.47x = 1,375,471,517.88
  5. Step 5: Solve for x
    x = 1,375,471,517.88/43,405.47
  6. Step 6: Final answer
    x = 31,688.90

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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.