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Finding the Fourth Proportional to 43,518.48, 65,245.80 and 13,919.28

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Solution

The fourth proportional to 43,518.48, 65,245.80 and 13,919.28 is: 20,868.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,518.48 : 65,245.80 = 13,919.28 : x
  2. Step 2: Convert to fraction form
    43,518.48/65,245.80 = 13,919.28/x
  3. Step 3: Cross multiply
    43,518.48x = 65,245.80 × 13,919.28
  4. Step 4: Simplify right side
    43,518.48x = 908,174,559.02
  5. Step 5: Solve for x
    x = 908,174,559.02/43,518.48
  6. Step 6: Final answer
    x = 20,868.71

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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.