Home / 21,211.23-31,817.25-6,420.09

Finding the Fourth Proportional to 21,211.23, 31,817.25 and 6,420.09

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Solution

The fourth proportional to 21,211.23, 31,817.25 and 6,420.09 is: 9,630.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.23 : 31,817.25 = 6,420.09 : x
  2. Step 2: Convert to fraction form
    21,211.23/31,817.25 = 6,420.09/x
  3. Step 3: Cross multiply
    21,211.23x = 31,817.25 × 6,420.09
  4. Step 4: Simplify right side
    21,211.23x = 204,269,608.55
  5. Step 5: Solve for x
    x = 204,269,608.55/21,211.23
  6. Step 6: Final answer
    x = 9,630.26

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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.