Home / 21,982.50-30,336.21-15,705.54

Finding the Fourth Proportional to 21,982.50, 30,336.21 and 15,705.54

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Solution

The fourth proportional to 21,982.50, 30,336.21 and 15,705.54 is: 21,673.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.50 : 30,336.21 = 15,705.54 : x
  2. Step 2: Convert to fraction form
    21,982.50/30,336.21 = 15,705.54/x
  3. Step 3: Cross multiply
    21,982.50x = 30,336.21 × 15,705.54
  4. Step 4: Simplify right side
    21,982.50x = 476,446,559.60
  5. Step 5: Solve for x
    x = 476,446,559.60/21,982.50
  6. Step 6: Final answer
    x = 21,673.90

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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.