Home / 5,247.21-7,240.68-2,889.30

Finding the Fourth Proportional to 5,247.21, 7,240.68 and 2,889.30

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Solution

The fourth proportional to 5,247.21, 7,240.68 and 2,889.30 is: 3,986.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,247.21 : 7,240.68 = 2,889.30 : x
  2. Step 2: Convert to fraction form
    5,247.21/7,240.68 = 2,889.30/x
  3. Step 3: Cross multiply
    5,247.21x = 7,240.68 × 2,889.30
  4. Step 4: Simplify right side
    5,247.21x = 20,920,496.72
  5. Step 5: Solve for x
    x = 20,920,496.72/5,247.21
  6. Step 6: Final answer
    x = 3,986.98

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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.