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Finding the Fourth Proportional to 5,391.90, 7,443.36 and 3,975.89

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Solution

The fourth proportional to 5,391.90, 7,443.36 and 3,975.89 is: 5,488.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.90 : 7,443.36 = 3,975.89 : x
  2. Step 2: Convert to fraction form
    5,391.90/7,443.36 = 3,975.89/x
  3. Step 3: Cross multiply
    5,391.90x = 7,443.36 × 3,975.89
  4. Step 4: Simplify right side
    5,391.90x = 29,593,943.37
  5. Step 5: Solve for x
    x = 29,593,943.37/5,391.90
  6. Step 6: Final answer
    x = 5,488.59

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1.5x scale

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.