Home / 20,721.37-31,091.25-10,858.31

Finding the Fourth Proportional to 20,721.37, 31,091.25 and 10,858.31

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Solution

The fourth proportional to 20,721.37, 31,091.25 and 10,858.31 is: 16,292.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.37 : 31,091.25 = 10,858.31 : x
  2. Step 2: Convert to fraction form
    20,721.37/31,091.25 = 10,858.31/x
  3. Step 3: Cross multiply
    20,721.37x = 31,091.25 × 10,858.31
  4. Step 4: Simplify right side
    20,721.37x = 337,598,430.79
  5. Step 5: Solve for x
    x = 337,598,430.79/20,721.37
  6. Step 6: Final answer
    x = 16,292.28

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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.