Home / 20,953.36-31,450.70-15,391.09

Finding the Fourth Proportional to 20,953.36, 31,450.70 and 15,391.09

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Solution

The fourth proportional to 20,953.36, 31,450.70 and 15,391.09 is: 23,101.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.36 : 31,450.70 = 15,391.09 : x
  2. Step 2: Convert to fraction form
    20,953.36/31,450.70 = 15,391.09/x
  3. Step 3: Cross multiply
    20,953.36x = 31,450.70 × 15,391.09
  4. Step 4: Simplify right side
    20,953.36x = 484,060,398.68
  5. Step 5: Solve for x
    x = 484,060,398.68/20,953.36
  6. Step 6: Final answer
    x = 23,101.81

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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.