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Finding the Fourth Proportional to 13,626.70, 18,801.55 and 7,958.23

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Solution

The fourth proportional to 13,626.70, 18,801.55 and 7,958.23 is: 10,980.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626.70 : 18,801.55 = 7,958.23 : x
  2. Step 2: Convert to fraction form
    13,626.70/18,801.55 = 7,958.23/x
  3. Step 3: Cross multiply
    13,626.70x = 18,801.55 × 7,958.23
  4. Step 4: Simplify right side
    13,626.70x = 149,627,059.26
  5. Step 5: Solve for x
    x = 149,627,059.26/13,626.70
  6. Step 6: Final answer
    x = 10,980.43

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Double scale
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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.