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Finding the Fourth Proportional to 18,319.80, 27,512.10 and 14,169.90

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Solution

The fourth proportional to 18,319.80, 27,512.10 and 14,169.90 is: 21,279.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,319.80 : 27,512.10 = 14,169.90 : x
  2. Step 2: Convert to fraction form
    18,319.80/27,512.10 = 14,169.90/x
  3. Step 3: Cross multiply
    18,319.80x = 27,512.10 × 14,169.90
  4. Step 4: Simplify right side
    18,319.80x = 389,843,705.79
  5. Step 5: Solve for x
    x = 389,843,705.79/18,319.80
  6. Step 6: Final answer
    x = 21,279.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.