Home / 7,789.40-11,685.65-2,859.09

Finding the Fourth Proportional to 7,789.40, 11,685.65 and 2,859.09

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Solution

The fourth proportional to 7,789.40, 11,685.65 and 2,859.09 is: 4,289.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,789.40 : 11,685.65 = 2,859.09 : x
  2. Step 2: Convert to fraction form
    7,789.40/11,685.65 = 2,859.09/x
  3. Step 3: Cross multiply
    7,789.40x = 11,685.65 × 2,859.09
  4. Step 4: Simplify right side
    7,789.40x = 33,410,266.94
  5. Step 5: Solve for x
    x = 33,410,266.94/7,789.40
  6. Step 6: Final answer
    x = 4,289.20

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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.