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Finding the Fourth Proportional to 13,546, 20,319 and 5,343.76

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Solution

The fourth proportional to 13,546, 20,319 and 5,343.76 is: 8,015.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,546 : 20,319 = 5,343.76 : x
  2. Step 2: Convert to fraction form
    13,546/20,319 = 5,343.76/x
  3. Step 3: Cross multiply
    13,546x = 20,319 × 5,343.76
  4. Step 4: Simplify right side
    13,546x = 108,579,859.44
  5. Step 5: Solve for x
    x = 108,579,859.44/13,546
  6. Step 6: Final answer
    x = 8,015.64

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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.