Home / 7,857.40-11,789.37-3,180.72

Finding the Fourth Proportional to 7,857.40, 11,789.37 and 3,180.72

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Solution

The fourth proportional to 7,857.40, 11,789.37 and 3,180.72 is: 4,772.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.40 : 11,789.37 = 3,180.72 : x
  2. Step 2: Convert to fraction form
    7,857.40/11,789.37 = 3,180.72/x
  3. Step 3: Cross multiply
    7,857.40x = 11,789.37 × 3,180.72
  4. Step 4: Simplify right side
    7,857.40x = 37,498,684.95
  5. Step 5: Solve for x
    x = 37,498,684.95/7,857.40
  6. Step 6: Final answer
    x = 4,772.40

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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.