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Finding the Fourth Proportional to 5,381.62, 7,426.63 and 2,991.52

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Solution

The fourth proportional to 5,381.62, 7,426.63 and 2,991.52 is: 4,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,381.62 : 7,426.63 = 2,991.52 : x
  2. Step 2: Convert to fraction form
    5,381.62/7,426.63 = 2,991.52/x
  3. Step 3: Cross multiply
    5,381.62x = 7,426.63 × 2,991.52
  4. Step 4: Simplify right side
    5,381.62x = 22,216,860.09
  5. Step 5: Solve for x
    x = 22,216,860.09/5,381.62
  6. Step 6: Final answer
    x = 4,128.29

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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.