Home / 12,103.45-18,158.63-3,783.58

Finding the Fourth Proportional to 12,103.45, 18,158.63 and 3,783.58

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Solution

The fourth proportional to 12,103.45, 18,158.63 and 3,783.58 is: 5,676.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.45 : 18,158.63 = 3,783.58 : x
  2. Step 2: Convert to fraction form
    12,103.45/18,158.63 = 3,783.58/x
  3. Step 3: Cross multiply
    12,103.45x = 18,158.63 × 3,783.58
  4. Step 4: Simplify right side
    12,103.45x = 68,704,629.30
  5. Step 5: Solve for x
    x = 68,704,629.30/12,103.45
  6. Step 6: Final answer
    x = 5,676.45

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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.