Home / 21,491.22-29,687.79-20,440.27

Finding the Fourth Proportional to 21,491.22, 29,687.79 and 20,440.27

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Solution

The fourth proportional to 21,491.22, 29,687.79 and 20,440.27 is: 28,236.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.22 : 29,687.79 = 20,440.27 : x
  2. Step 2: Convert to fraction form
    21,491.22/29,687.79 = 20,440.27/x
  3. Step 3: Cross multiply
    21,491.22x = 29,687.79 × 20,440.27
  4. Step 4: Simplify right side
    21,491.22x = 606,826,583.07
  5. Step 5: Solve for x
    x = 606,826,583.07/21,491.22
  6. Step 6: Final answer
    x = 28,236.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.