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Finding the Fourth Proportional to 13,680, 20,522.92 and 4,322.76

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Solution

The fourth proportional to 13,680, 20,522.92 and 4,322.76 is: 6,485.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680 : 20,522.92 = 4,322.76 : x
  2. Step 2: Convert to fraction form
    13,680/20,522.92 = 4,322.76/x
  3. Step 3: Cross multiply
    13,680x = 20,522.92 × 4,322.76
  4. Step 4: Simplify right side
    13,680x = 88,715,657.66
  5. Step 5: Solve for x
    x = 88,715,657.66/13,680
  6. Step 6: Final answer
    x = 6,485.06

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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.