Home / 31,622.08-43,638.40-20,444

Finding the Fourth Proportional to 31,622.08, 43,638.40 and 20,444

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Solution

The fourth proportional to 31,622.08, 43,638.40 and 20,444 is: 28,212.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,622.08 : 43,638.40 = 20,444 : x
  2. Step 2: Convert to fraction form
    31,622.08/43,638.40 = 20,444/x
  3. Step 3: Cross multiply
    31,622.08x = 43,638.40 × 20,444
  4. Step 4: Simplify right side
    31,622.08x = 892,143,449.60
  5. Step 5: Solve for x
    x = 892,143,449.60/31,622.08
  6. Step 6: Final answer
    x = 28,212.67

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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.