Home / 13,155.96-18,160.26-8,121

Finding the Fourth Proportional to 13,155.96, 18,160.26 and 8,121

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Solution

The fourth proportional to 13,155.96, 18,160.26 and 8,121 is: 11,210.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.96 : 18,160.26 = 8,121 : x
  2. Step 2: Convert to fraction form
    13,155.96/18,160.26 = 8,121/x
  3. Step 3: Cross multiply
    13,155.96x = 18,160.26 × 8,121
  4. Step 4: Simplify right side
    13,155.96x = 147,479,471.46
  5. Step 5: Solve for x
    x = 147,479,471.46/13,155.96
  6. Step 6: Final answer
    x = 11,210.09

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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.