Home / 5,128.73-7,077.03-2,890.53

Finding the Fourth Proportional to 5,128.73, 7,077.03 and 2,890.53

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Solution

The fourth proportional to 5,128.73, 7,077.03 and 2,890.53 is: 3,988.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.73 : 7,077.03 = 2,890.53 : x
  2. Step 2: Convert to fraction form
    5,128.73/7,077.03 = 2,890.53/x
  3. Step 3: Cross multiply
    5,128.73x = 7,077.03 × 2,890.53
  4. Step 4: Simplify right side
    5,128.73x = 20,456,367.53
  5. Step 5: Solve for x
    x = 20,456,367.53/5,128.73
  6. Step 6: Final answer
    x = 3,988.58

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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.