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Finding the Fourth Proportional to 43,378.98, 65,068.47 and 13,796.88

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Solution

The fourth proportional to 43,378.98, 65,068.47 and 13,796.88 is: 20,695.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,378.98 : 65,068.47 = 13,796.88 : x
  2. Step 2: Convert to fraction form
    43,378.98/65,068.47 = 13,796.88/x
  3. Step 3: Cross multiply
    43,378.98x = 65,068.47 × 13,796.88
  4. Step 4: Simplify right side
    43,378.98x = 897,741,872.37
  5. Step 5: Solve for x
    x = 897,741,872.37/43,378.98
  6. Step 6: Final answer
    x = 20,695.32

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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.