Home / 12,815.37-19,223.97-3,929.55

Finding the Fourth Proportional to 12,815.37, 19,223.97 and 3,929.55

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Solution

The fourth proportional to 12,815.37, 19,223.97 and 3,929.55 is: 5,894.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.37 : 19,223.97 = 3,929.55 : x
  2. Step 2: Convert to fraction form
    12,815.37/19,223.97 = 3,929.55/x
  3. Step 3: Cross multiply
    12,815.37x = 19,223.97 × 3,929.55
  4. Step 4: Simplify right side
    12,815.37x = 75,541,464.49
  5. Step 5: Solve for x
    x = 75,541,464.49/12,815.37
  6. Step 6: Final answer
    x = 5,894.60

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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.