Home / 12,121.52-18,182.24-3,913.52

Finding the Fourth Proportional to 12,121.52, 18,182.24 and 3,913.52

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Solution

The fourth proportional to 12,121.52, 18,182.24 and 3,913.52 is: 5,870.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.52 : 18,182.24 = 3,913.52 : x
  2. Step 2: Convert to fraction form
    12,121.52/18,182.24 = 3,913.52/x
  3. Step 3: Cross multiply
    12,121.52x = 18,182.24 × 3,913.52
  4. Step 4: Simplify right side
    12,121.52x = 71,156,559.88
  5. Step 5: Solve for x
    x = 71,156,559.88/12,121.52
  6. Step 6: Final answer
    x = 5,870.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.