Home / 39,405.53-54,379.43-21,500.48

Finding the Fourth Proportional to 39,405.53, 54,379.43 and 21,500.48

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Solution

The fourth proportional to 39,405.53, 54,379.43 and 21,500.48 is: 29,670.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.53 : 54,379.43 = 21,500.48 : x
  2. Step 2: Convert to fraction form
    39,405.53/54,379.43 = 21,500.48/x
  3. Step 3: Cross multiply
    39,405.53x = 54,379.43 × 21,500.48
  4. Step 4: Simplify right side
    39,405.53x = 1,169,183,847.13
  5. Step 5: Solve for x
    x = 1,169,183,847.13/39,405.53
  6. Step 6: Final answer
    x = 29,670.55

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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.