Home / 13,745.61-20,618.37-4,978.49

Finding the Fourth Proportional to 13,745.61, 20,618.37 and 4,978.49

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Solution

The fourth proportional to 13,745.61, 20,618.37 and 4,978.49 is: 7,467.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.61 : 20,618.37 = 4,978.49 : x
  2. Step 2: Convert to fraction form
    13,745.61/20,618.37 = 4,978.49/x
  3. Step 3: Cross multiply
    13,745.61x = 20,618.37 × 4,978.49
  4. Step 4: Simplify right side
    13,745.61x = 102,648,245.77
  5. Step 5: Solve for x
    x = 102,648,245.77/13,745.61
  6. Step 6: Final answer
    x = 7,467.71

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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.