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Finding the Fourth Proportional to 13,164.99, 18,179.87 and 8,457.54

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Solution

The fourth proportional to 13,164.99, 18,179.87 and 8,457.54 is: 11,679.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,164.99 : 18,179.87 = 8,457.54 : x
  2. Step 2: Convert to fraction form
    13,164.99/18,179.87 = 8,457.54/x
  3. Step 3: Cross multiply
    13,164.99x = 18,179.87 × 8,457.54
  4. Step 4: Simplify right side
    13,164.99x = 153,756,977.72
  5. Step 5: Solve for x
    x = 153,756,977.72/13,164.99
  6. Step 6: Final answer
    x = 11,679.23

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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.