Home / 45,982.50-68,911.38-20,991.57

Finding the Fourth Proportional to 45,982.50, 68,911.38 and 20,991.57

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Solution

The fourth proportional to 45,982.50, 68,911.38 and 20,991.57 is: 31,458.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,982.50 : 68,911.38 = 20,991.57 : x
  2. Step 2: Convert to fraction form
    45,982.50/68,911.38 = 20,991.57/x
  3. Step 3: Cross multiply
    45,982.50x = 68,911.38 × 20,991.57
  4. Step 4: Simplify right side
    45,982.50x = 1,446,558,057.07
  5. Step 5: Solve for x
    x = 1,446,558,057.07/45,982.50
  6. Step 6: Final answer
    x = 31,458.88

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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.