Home / 13,745.48-20,621.86-4,385.12

Finding the Fourth Proportional to 13,745.48, 20,621.86 and 4,385.12

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Solution

The fourth proportional to 13,745.48, 20,621.86 and 4,385.12 is: 6,578.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.48 : 20,621.86 = 4,385.12 : x
  2. Step 2: Convert to fraction form
    13,745.48/20,621.86 = 4,385.12/x
  3. Step 3: Cross multiply
    13,745.48x = 20,621.86 × 4,385.12
  4. Step 4: Simplify right side
    13,745.48x = 90,429,330.72
  5. Step 5: Solve for x
    x = 90,429,330.72/13,745.48
  6. Step 6: Final answer
    x = 6,578.84

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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.