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Finding the Fourth Proportional to 6,318.61, 9,478.32 and 1,939.12

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Solution

The fourth proportional to 6,318.61, 9,478.32 and 1,939.12 is: 2,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,318.61 : 9,478.32 = 1,939.12 : x
  2. Step 2: Convert to fraction form
    6,318.61/9,478.32 = 1,939.12/x
  3. Step 3: Cross multiply
    6,318.61x = 9,478.32 × 1,939.12
  4. Step 4: Simplify right side
    6,318.61x = 18,379,599.88
  5. Step 5: Solve for x
    x = 18,379,599.88/6,318.61
  6. Step 6: Final answer
    x = 2,908.80

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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.