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Finding the Fourth Proportional to 13,163.01, 18,170.93 and 8,389.51

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Solution

The fourth proportional to 13,163.01, 18,170.93 and 8,389.51 is: 11,581.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,163.01 : 18,170.93 = 8,389.51 : x
  2. Step 2: Convert to fraction form
    13,163.01/18,170.93 = 8,389.51/x
  3. Step 3: Cross multiply
    13,163.01x = 18,170.93 × 8,389.51
  4. Step 4: Simplify right side
    13,163.01x = 152,445,174.49
  5. Step 5: Solve for x
    x = 152,445,174.49/13,163.01
  6. Step 6: Final answer
    x = 11,581.33

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Double scale
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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.