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Finding the Fourth Proportional to 6,216, 8,572.86 and 3,856.56

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Solution

The fourth proportional to 6,216, 8,572.86 and 3,856.56 is: 5,318.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,216 : 8,572.86 = 3,856.56 : x
  2. Step 2: Convert to fraction form
    6,216/8,572.86 = 3,856.56/x
  3. Step 3: Cross multiply
    6,216x = 8,572.86 × 3,856.56
  4. Step 4: Simplify right side
    6,216x = 33,061,748.96
  5. Step 5: Solve for x
    x = 33,061,748.96/6,216
  6. Step 6: Final answer
    x = 5,318.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.