Home / 43,405.20-65,112.66-13,815.90

Finding the Fourth Proportional to 43,405.20, 65,112.66 and 13,815.90

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Solution

The fourth proportional to 43,405.20, 65,112.66 and 13,815.90 is: 20,725.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,405.20 : 65,112.66 = 13,815.90 : x
  2. Step 2: Convert to fraction form
    43,405.20/65,112.66 = 13,815.90/x
  3. Step 3: Cross multiply
    43,405.20x = 65,112.66 × 13,815.90
  4. Step 4: Simplify right side
    43,405.20x = 899,589,999.29
  5. Step 5: Solve for x
    x = 899,589,999.29/43,405.20
  6. Step 6: Final answer
    x = 20,725.40

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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.