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Finding the Fourth Proportional to 45,968.84, 68,951.88 and 12,690.90

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Solution

The fourth proportional to 45,968.84, 68,951.88 and 12,690.90 is: 19,035.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,968.84 : 68,951.88 = 12,690.90 : x
  2. Step 2: Convert to fraction form
    45,968.84/68,951.88 = 12,690.90/x
  3. Step 3: Cross multiply
    45,968.84x = 68,951.88 × 12,690.90
  4. Step 4: Simplify right side
    45,968.84x = 875,061,413.89
  5. Step 5: Solve for x
    x = 875,061,413.89/45,968.84
  6. Step 6: Final answer
    x = 19,035.97

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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.