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Finding the Fourth Proportional to 13,164.80, 18,158.52 and 8,454.80

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Solution

The fourth proportional to 13,164.80, 18,158.52 and 8,454.80 is: 11,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,164.80 : 18,158.52 = 8,454.80 : x
  2. Step 2: Convert to fraction form
    13,164.80/18,158.52 = 8,454.80/x
  3. Step 3: Cross multiply
    13,164.80x = 18,158.52 × 8,454.80
  4. Step 4: Simplify right side
    13,164.80x = 153,526,654.90
  5. Step 5: Solve for x
    x = 153,526,654.90/13,164.80
  6. Step 6: Final answer
    x = 11,661.91

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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.