Home / 20,910.33-31,341.63-8,422.36

Finding the Fourth Proportional to 20,910.33, 31,341.63 and 8,422.36

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Solution

The fourth proportional to 20,910.33, 31,341.63 and 8,422.36 is: 12,623.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.33 : 31,341.63 = 8,422.36 : x
  2. Step 2: Convert to fraction form
    20,910.33/31,341.63 = 8,422.36/x
  3. Step 3: Cross multiply
    20,910.33x = 31,341.63 × 8,422.36
  4. Step 4: Simplify right side
    20,910.33x = 263,970,490.85
  5. Step 5: Solve for x
    x = 263,970,490.85/20,910.33
  6. Step 6: Final answer
    x = 12,623.93

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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.