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Finding the Fourth Proportional to 13,105.08, 18,082.98 and 7,515

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Solution

The fourth proportional to 13,105.08, 18,082.98 and 7,515 is: 10,369.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.08 : 18,082.98 = 7,515 : x
  2. Step 2: Convert to fraction form
    13,105.08/18,082.98 = 7,515/x
  3. Step 3: Cross multiply
    13,105.08x = 18,082.98 × 7,515
  4. Step 4: Simplify right side
    13,105.08x = 135,893,594.70
  5. Step 5: Solve for x
    x = 135,893,594.70/13,105.08
  6. Step 6: Final answer
    x = 10,369.54

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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.