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Finding the Fourth Proportional to 43,516.48, 65,242.80 and 13,917.28

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Solution

The fourth proportional to 43,516.48, 65,242.80 and 13,917.28 is: 20,865.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,516.48 : 65,242.80 = 13,917.28 : x
  2. Step 2: Convert to fraction form
    43,516.48/65,242.80 = 13,917.28/x
  3. Step 3: Cross multiply
    43,516.48x = 65,242.80 × 13,917.28
  4. Step 4: Simplify right side
    43,516.48x = 908,002,315.58
  5. Step 5: Solve for x
    x = 908,002,315.58/43,516.48
  6. Step 6: Final answer
    x = 20,865.71

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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.