Home / 5,215.99-7,197.85-3,121.27

Finding the Fourth Proportional to 5,215.99, 7,197.85 and 3,121.27

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Solution

The fourth proportional to 5,215.99, 7,197.85 and 3,121.27 is: 4,307.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.99 : 7,197.85 = 3,121.27 : x
  2. Step 2: Convert to fraction form
    5,215.99/7,197.85 = 3,121.27/x
  3. Step 3: Cross multiply
    5,215.99x = 7,197.85 × 3,121.27
  4. Step 4: Simplify right side
    5,215.99x = 22,466,433.27
  5. Step 5: Solve for x
    x = 22,466,433.27/5,215.99
  6. Step 6: Final answer
    x = 4,307.22

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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.