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Finding the Fourth Proportional to 13,679.51, 20,520.26 and 4,914.50

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Solution

The fourth proportional to 13,679.51, 20,520.26 and 4,914.50 is: 7,372.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.51 : 20,520.26 = 4,914.50 : x
  2. Step 2: Convert to fraction form
    13,679.51/20,520.26 = 4,914.50/x
  3. Step 3: Cross multiply
    13,679.51x = 20,520.26 × 4,914.50
  4. Step 4: Simplify right side
    13,679.51x = 100,846,690.60
  5. Step 5: Solve for x
    x = 100,846,690.60/13,679.51
  6. Step 6: Final answer
    x = 7,372.10

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1.5x scale

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.