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Finding the Fourth Proportional to 6,990.86, 10,486.29 and 5,755.67

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Solution

The fourth proportional to 6,990.86, 10,486.29 and 5,755.67 is: 8,633.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.86 : 10,486.29 = 5,755.67 : x
  2. Step 2: Convert to fraction form
    6,990.86/10,486.29 = 5,755.67/x
  3. Step 3: Cross multiply
    6,990.86x = 10,486.29 × 5,755.67
  4. Step 4: Simplify right side
    6,990.86x = 60,355,667.94
  5. Step 5: Solve for x
    x = 60,355,667.94/6,990.86
  6. Step 6: Final answer
    x = 8,633.51

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Similar ratio
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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.