Home / 43,390.20-65,109.26-21,203.72

Finding the Fourth Proportional to 43,390.20, 65,109.26 and 21,203.72

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Solution

The fourth proportional to 43,390.20, 65,109.26 and 21,203.72 is: 31,817.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,390.20 : 65,109.26 = 21,203.72 : x
  2. Step 2: Convert to fraction form
    43,390.20/65,109.26 = 21,203.72/x
  3. Step 3: Cross multiply
    43,390.20x = 65,109.26 × 21,203.72
  4. Step 4: Simplify right side
    43,390.20x = 1,380,558,518.45
  5. Step 5: Solve for x
    x = 1,380,558,518.45/43,390.20
  6. Step 6: Final answer
    x = 31,817.29

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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.