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Finding the Fourth Proportional to 13,168.59, 18,174.36 and 7,505.40

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Solution

The fourth proportional to 13,168.59, 18,174.36 and 7,505.40 is: 10,358.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.59 : 18,174.36 = 7,505.40 : x
  2. Step 2: Convert to fraction form
    13,168.59/18,174.36 = 7,505.40/x
  3. Step 3: Cross multiply
    13,168.59x = 18,174.36 × 7,505.40
  4. Step 4: Simplify right side
    13,168.59x = 136,405,841.54
  5. Step 5: Solve for x
    x = 136,405,841.54/13,168.59
  6. Step 6: Final answer
    x = 10,358.42

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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.