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Finding the Fourth Proportional to 45,968.70, 68,951.68 and 12,690.80

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Solution

The fourth proportional to 45,968.70, 68,951.68 and 12,690.80 is: 19,035.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,968.70 : 68,951.68 = 12,690.80 : x
  2. Step 2: Convert to fraction form
    45,968.70/68,951.68 = 12,690.80/x
  3. Step 3: Cross multiply
    45,968.70x = 68,951.68 × 12,690.80
  4. Step 4: Simplify right side
    45,968.70x = 875,051,604.06
  5. Step 5: Solve for x
    x = 875,051,604.06/45,968.70
  6. Step 6: Final answer
    x = 19,035.81

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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.