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Finding the Fourth Proportional to 14,679.39, 20,257.64 and 7,965.03

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Solution

The fourth proportional to 14,679.39, 20,257.64 and 7,965.03 is: 10,991.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,679.39 : 20,257.64 = 7,965.03 : x
  2. Step 2: Convert to fraction form
    14,679.39/20,257.64 = 7,965.03/x
  3. Step 3: Cross multiply
    14,679.39x = 20,257.64 × 7,965.03
  4. Step 4: Simplify right side
    14,679.39x = 161,352,821.14
  5. Step 5: Solve for x
    x = 161,352,821.14/14,679.39
  6. Step 6: Final answer
    x = 10,991.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.