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Finding the Fourth Proportional to 14,234.80, 21,319.80 and 8,402.80

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Solution

The fourth proportional to 14,234.80, 21,319.80 and 8,402.80 is: 12,585.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,234.80 : 21,319.80 = 8,402.80 : x
  2. Step 2: Convert to fraction form
    14,234.80/21,319.80 = 8,402.80/x
  3. Step 3: Cross multiply
    14,234.80x = 21,319.80 × 8,402.80
  4. Step 4: Simplify right side
    14,234.80x = 179,146,015.44
  5. Step 5: Solve for x
    x = 179,146,015.44/14,234.80
  6. Step 6: Final answer
    x = 12,585.07

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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.