Home / 28,969.57-39,974.88-18,211.96

Finding the Fourth Proportional to 28,969.57, 39,974.88 and 18,211.96

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Solution

The fourth proportional to 28,969.57, 39,974.88 and 18,211.96 is: 25,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969.57 : 39,974.88 = 18,211.96 : x
  2. Step 2: Convert to fraction form
    28,969.57/39,974.88 = 18,211.96/x
  3. Step 3: Cross multiply
    28,969.57x = 39,974.88 × 18,211.96
  4. Step 4: Simplify right side
    28,969.57x = 728,020,915.56
  5. Step 5: Solve for x
    x = 728,020,915.56/28,969.57
  6. Step 6: Final answer
    x = 25,130.54

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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.