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Finding the Fourth Proportional to 43,478.49, 65,212.29 and 13,893.87

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Solution

The fourth proportional to 43,478.49, 65,212.29 and 13,893.87 is: 20,839.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,478.49 : 65,212.29 = 13,893.87 : x
  2. Step 2: Convert to fraction form
    43,478.49/65,212.29 = 13,893.87/x
  3. Step 3: Cross multiply
    43,478.49x = 65,212.29 × 13,893.87
  4. Step 4: Simplify right side
    43,478.49x = 906,051,079.66
  5. Step 5: Solve for x
    x = 906,051,079.66/43,478.49
  6. Step 6: Final answer
    x = 20,839.07

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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.