Home / 5,128.40-7,077.20-2,770.54

Finding the Fourth Proportional to 5,128.40, 7,077.20 and 2,770.54

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Solution

The fourth proportional to 5,128.40, 7,077.20 and 2,770.54 is: 3,823.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.40 : 7,077.20 = 2,770.54 : x
  2. Step 2: Convert to fraction form
    5,128.40/7,077.20 = 2,770.54/x
  3. Step 3: Cross multiply
    5,128.40x = 7,077.20 × 2,770.54
  4. Step 4: Simplify right side
    5,128.40x = 19,607,665.69
  5. Step 5: Solve for x
    x = 19,607,665.69/5,128.40
  6. Step 6: Final answer
    x = 3,823.35

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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.