Home / 13,118.21-18,102.67-7,149.76

Finding the Fourth Proportional to 13,118.21, 18,102.67 and 7,149.76

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Solution

The fourth proportional to 13,118.21, 18,102.67 and 7,149.76 is: 9,866.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.21 : 18,102.67 = 7,149.76 : x
  2. Step 2: Convert to fraction form
    13,118.21/18,102.67 = 7,149.76/x
  3. Step 3: Cross multiply
    13,118.21x = 18,102.67 × 7,149.76
  4. Step 4: Simplify right side
    13,118.21x = 129,429,745.86
  5. Step 5: Solve for x
    x = 129,429,745.86/13,118.21
  6. Step 6: Final answer
    x = 9,866.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.