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Finding the Fourth Proportional to 43,909.66, 65,879.28 and 13,928.86

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Solution

The fourth proportional to 43,909.66, 65,879.28 and 13,928.86 is: 20,897.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,909.66 : 65,879.28 = 13,928.86 : x
  2. Step 2: Convert to fraction form
    43,909.66/65,879.28 = 13,928.86/x
  3. Step 3: Cross multiply
    43,909.66x = 65,879.28 × 13,928.86
  4. Step 4: Simplify right side
    43,909.66x = 917,623,268.02
  5. Step 5: Solve for x
    x = 917,623,268.02/43,909.66
  6. Step 6: Final answer
    x = 20,897.98

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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.