Home / 20,722.20-31,010.40-14,452.80

Finding the Fourth Proportional to 20,722.20, 31,010.40 and 14,452.80

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Solution

The fourth proportional to 20,722.20, 31,010.40 and 14,452.80 is: 21,628.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.20 : 31,010.40 = 14,452.80 : x
  2. Step 2: Convert to fraction form
    20,722.20/31,010.40 = 14,452.80/x
  3. Step 3: Cross multiply
    20,722.20x = 31,010.40 × 14,452.80
  4. Step 4: Simplify right side
    20,722.20x = 448,187,109.12
  5. Step 5: Solve for x
    x = 448,187,109.12/20,722.20
  6. Step 6: Final answer
    x = 21,628.36

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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.