Home / 5,189.70-7,782.21-1,491.09

Finding the Fourth Proportional to 5,189.70, 7,782.21 and 1,491.09

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Solution

The fourth proportional to 5,189.70, 7,782.21 and 1,491.09 is: 2,235.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,189.70 : 7,782.21 = 1,491.09 : x
  2. Step 2: Convert to fraction form
    5,189.70/7,782.21 = 1,491.09/x
  3. Step 3: Cross multiply
    5,189.70x = 7,782.21 × 1,491.09
  4. Step 4: Simplify right side
    5,189.70x = 11,603,975.51
  5. Step 5: Solve for x
    x = 11,603,975.51/5,189.70
  6. Step 6: Final answer
    x = 2,235.96

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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.