Home / 21,408.06-32,121.32-8,930.54

Finding the Fourth Proportional to 21,408.06, 32,121.32 and 8,930.54

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Solution

The fourth proportional to 21,408.06, 32,121.32 and 8,930.54 is: 13,399.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.06 : 32,121.32 = 8,930.54 : x
  2. Step 2: Convert to fraction form
    21,408.06/32,121.32 = 8,930.54/x
  3. Step 3: Cross multiply
    21,408.06x = 32,121.32 × 8,930.54
  4. Step 4: Simplify right side
    21,408.06x = 286,860,835.74
  5. Step 5: Solve for x
    x = 286,860,835.74/21,408.06
  6. Step 6: Final answer
    x = 13,399.67

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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.