Home / 5,187.70-7,779.21-1,489.09

Finding the Fourth Proportional to 5,187.70, 7,779.21 and 1,489.09

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Solution

The fourth proportional to 5,187.70, 7,779.21 and 1,489.09 is: 2,232.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.70 : 7,779.21 = 1,489.09 : x
  2. Step 2: Convert to fraction form
    5,187.70/7,779.21 = 1,489.09/x
  3. Step 3: Cross multiply
    5,187.70x = 7,779.21 × 1,489.09
  4. Step 4: Simplify right side
    5,187.70x = 11,583,943.82
  5. Step 5: Solve for x
    x = 11,583,943.82/5,187.70
  6. Step 6: Final answer
    x = 2,232.96

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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.