Home / 7,107.41-9,807.79-3,920.75

Finding the Fourth Proportional to 7,107.41, 9,807.79 and 3,920.75

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Solution

The fourth proportional to 7,107.41, 9,807.79 and 3,920.75 is: 5,410.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,107.41 : 9,807.79 = 3,920.75 : x
  2. Step 2: Convert to fraction form
    7,107.41/9,807.79 = 3,920.75/x
  3. Step 3: Cross multiply
    7,107.41x = 9,807.79 × 3,920.75
  4. Step 4: Simplify right side
    7,107.41x = 38,453,877.93
  5. Step 5: Solve for x
    x = 38,453,877.93/7,107.41
  6. Step 6: Final answer
    x = 5,410.39

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Half scale
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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.