Home / 12,289.54-18,431.88-4,495.72

Finding the Fourth Proportional to 12,289.54, 18,431.88 and 4,495.72

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Solution

The fourth proportional to 12,289.54, 18,431.88 and 4,495.72 is: 6,742.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.54 : 18,431.88 = 4,495.72 : x
  2. Step 2: Convert to fraction form
    12,289.54/18,431.88 = 4,495.72/x
  3. Step 3: Cross multiply
    12,289.54x = 18,431.88 × 4,495.72
  4. Step 4: Simplify right side
    12,289.54x = 82,864,571.55
  5. Step 5: Solve for x
    x = 82,864,571.55/12,289.54
  6. Step 6: Final answer
    x = 6,742.69

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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.