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Finding the Fourth Proportional to 9,318.87, 12,859.93 and 6,939.49

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Solution

The fourth proportional to 9,318.87, 12,859.93 and 6,939.49 is: 9,576.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.87 : 12,859.93 = 6,939.49 : x
  2. Step 2: Convert to fraction form
    9,318.87/12,859.93 = 6,939.49/x
  3. Step 3: Cross multiply
    9,318.87x = 12,859.93 × 6,939.49
  4. Step 4: Simplify right side
    9,318.87x = 89,241,355.64
  5. Step 5: Solve for x
    x = 89,241,355.64/9,318.87
  6. Step 6: Final answer
    x = 9,576.41

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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.