Home / 3,905.61-5,391.51-2,491.20

Finding the Fourth Proportional to 3,905.61, 5,391.51 and 2,491.20

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Solution

The fourth proportional to 3,905.61, 5,391.51 and 2,491.20 is: 3,438.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.61 : 5,391.51 = 2,491.20 : x
  2. Step 2: Convert to fraction form
    3,905.61/5,391.51 = 2,491.20/x
  3. Step 3: Cross multiply
    3,905.61x = 5,391.51 × 2,491.20
  4. Step 4: Simplify right side
    3,905.61x = 13,431,317.26
  5. Step 5: Solve for x
    x = 13,431,317.26/3,905.61
  6. Step 6: Final answer
    x = 3,438.98

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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.