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Finding the Fourth Proportional to 11,349.80, 16,995.90 and 8,412.20

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Solution

The fourth proportional to 11,349.80, 16,995.90 and 8,412.20 is: 12,596.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,349.80 : 16,995.90 = 8,412.20 : x
  2. Step 2: Convert to fraction form
    11,349.80/16,995.90 = 8,412.20/x
  3. Step 3: Cross multiply
    11,349.80x = 16,995.90 × 8,412.20
  4. Step 4: Simplify right side
    11,349.80x = 142,972,909.98
  5. Step 5: Solve for x
    x = 142,972,909.98/11,349.80
  6. Step 6: Final answer
    x = 12,596.95

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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.