Home / 13,617.18-18,790.68-7,647.68

Finding the Fourth Proportional to 13,617.18, 18,790.68 and 7,647.68

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Solution

The fourth proportional to 13,617.18, 18,790.68 and 7,647.68 is: 10,553.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.18 : 18,790.68 = 7,647.68 : x
  2. Step 2: Convert to fraction form
    13,617.18/18,790.68 = 7,647.68/x
  3. Step 3: Cross multiply
    13,617.18x = 18,790.68 × 7,647.68
  4. Step 4: Simplify right side
    13,617.18x = 143,705,183.28
  5. Step 5: Solve for x
    x = 143,705,183.28/13,617.18
  6. Step 6: Final answer
    x = 10,553.23

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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.