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Finding the Fourth Proportional to 13,319.08, 18,380.08 and 7,350.40

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Solution

The fourth proportional to 13,319.08, 18,380.08 and 7,350.40 is: 10,143.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.08 : 18,380.08 = 7,350.40 : x
  2. Step 2: Convert to fraction form
    13,319.08/18,380.08 = 7,350.40/x
  3. Step 3: Cross multiply
    13,319.08x = 18,380.08 × 7,350.40
  4. Step 4: Simplify right side
    13,319.08x = 135,100,940.03
  5. Step 5: Solve for x
    x = 135,100,940.03/13,319.08
  6. Step 6: Final answer
    x = 10,143.41

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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.