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Finding the Fourth Proportional to 6,438.81, 8,884.81 and 3,605.79

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Solution

The fourth proportional to 6,438.81, 8,884.81 and 3,605.79 is: 4,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.81 : 8,884.81 = 3,605.79 : x
  2. Step 2: Convert to fraction form
    6,438.81/8,884.81 = 3,605.79/x
  3. Step 3: Cross multiply
    6,438.81x = 8,884.81 × 3,605.79
  4. Step 4: Simplify right side
    6,438.81x = 32,036,759.05
  5. Step 5: Solve for x
    x = 32,036,759.05/6,438.81
  6. Step 6: Final answer
    x = 4,975.57

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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.