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Finding the Fourth Proportional to 5,679.89, 8,520.91 and 1,983.17

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Solution

The fourth proportional to 5,679.89, 8,520.91 and 1,983.17 is: 2,975.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.89 : 8,520.91 = 1,983.17 : x
  2. Step 2: Convert to fraction form
    5,679.89/8,520.91 = 1,983.17/x
  3. Step 3: Cross multiply
    5,679.89x = 8,520.91 × 1,983.17
  4. Step 4: Simplify right side
    5,679.89x = 16,898,413.08
  5. Step 5: Solve for x
    x = 16,898,413.08/5,679.89
  6. Step 6: Final answer
    x = 2,975.13

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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.