Home / 13,745.21-20,603.72-5,421.85

Finding the Fourth Proportional to 13,745.21, 20,603.72 and 5,421.85

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Solution

The fourth proportional to 13,745.21, 20,603.72 and 5,421.85 is: 8,127.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.21 : 20,603.72 = 5,421.85 : x
  2. Step 2: Convert to fraction form
    13,745.21/20,603.72 = 5,421.85/x
  3. Step 3: Cross multiply
    13,745.21x = 20,603.72 × 5,421.85
  4. Step 4: Simplify right side
    13,745.21x = 111,710,241.33
  5. Step 5: Solve for x
    x = 111,710,241.33/13,745.21
  6. Step 6: Final answer
    x = 8,127.22

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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.