Home / 5,221.36-7,830.08-2,100.31

Finding the Fourth Proportional to 5,221.36, 7,830.08 and 2,100.31

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Solution

The fourth proportional to 5,221.36, 7,830.08 and 2,100.31 is: 3,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.36 : 7,830.08 = 2,100.31 : x
  2. Step 2: Convert to fraction form
    5,221.36/7,830.08 = 2,100.31/x
  3. Step 3: Cross multiply
    5,221.36x = 7,830.08 × 2,100.31
  4. Step 4: Simplify right side
    5,221.36x = 16,445,573.12
  5. Step 5: Solve for x
    x = 16,445,573.12/5,221.36
  6. Step 6: Final answer
    x = 3,149.67

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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.