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Finding the Fourth Proportional to 9,855.70, 13,600.89 and 6,318.92

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Solution

The fourth proportional to 9,855.70, 13,600.89 and 6,318.92 is: 8,720.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,855.70 : 13,600.89 = 6,318.92 : x
  2. Step 2: Convert to fraction form
    9,855.70/13,600.89 = 6,318.92/x
  3. Step 3: Cross multiply
    9,855.70x = 13,600.89 × 6,318.92
  4. Step 4: Simplify right side
    9,855.70x = 85,942,935.84
  5. Step 5: Solve for x
    x = 85,942,935.84/9,855.70
  6. Step 6: Final answer
    x = 8,720.12

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1.5x scale

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.