Home / 5,128.41-7,077.36-2,890.17

Finding the Fourth Proportional to 5,128.41, 7,077.36 and 2,890.17

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Solution

The fourth proportional to 5,128.41, 7,077.36 and 2,890.17 is: 3,988.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.41 : 7,077.36 = 2,890.17 : x
  2. Step 2: Convert to fraction form
    5,128.41/7,077.36 = 2,890.17/x
  3. Step 3: Cross multiply
    5,128.41x = 7,077.36 × 2,890.17
  4. Step 4: Simplify right side
    5,128.41x = 20,454,773.55
  5. Step 5: Solve for x
    x = 20,454,773.55/5,128.41
  6. Step 6: Final answer
    x = 3,988.52

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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.