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Finding the Fourth Proportional to 13,616.15, 18,790.29 and 7,647.67

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Solution

The fourth proportional to 13,616.15, 18,790.29 and 7,647.67 is: 10,553.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,616.15 : 18,790.29 = 7,647.67 : x
  2. Step 2: Convert to fraction form
    13,616.15/18,790.29 = 7,647.67/x
  3. Step 3: Cross multiply
    13,616.15x = 18,790.29 × 7,647.67
  4. Step 4: Simplify right side
    13,616.15x = 143,701,890.15
  5. Step 5: Solve for x
    x = 143,701,890.15/13,616.15
  6. Step 6: Final answer
    x = 10,553.78

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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.