Home / 6,439.94-9,661.73-3,809.78

Finding the Fourth Proportional to 6,439.94, 9,661.73 and 3,809.78

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Solution

The fourth proportional to 6,439.94, 9,661.73 and 3,809.78 is: 5,715.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.94 : 9,661.73 = 3,809.78 : x
  2. Step 2: Convert to fraction form
    6,439.94/9,661.73 = 3,809.78/x
  3. Step 3: Cross multiply
    6,439.94x = 9,661.73 × 3,809.78
  4. Step 4: Simplify right side
    6,439.94x = 36,808,998.36
  5. Step 5: Solve for x
    x = 36,808,998.36/6,439.94
  6. Step 6: Final answer
    x = 5,715.74

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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.