Home / 21,225.85-29,321.57-20,104.82

Finding the Fourth Proportional to 21,225.85, 29,321.57 and 20,104.82

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Solution

The fourth proportional to 21,225.85, 29,321.57 and 20,104.82 is: 27,772.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.85 : 29,321.57 = 20,104.82 : x
  2. Step 2: Convert to fraction form
    21,225.85/29,321.57 = 20,104.82/x
  3. Step 3: Cross multiply
    21,225.85x = 29,321.57 × 20,104.82
  4. Step 4: Simplify right side
    21,225.85x = 589,505,065.51
  5. Step 5: Solve for x
    x = 589,505,065.51/21,225.85
  6. Step 6: Final answer
    x = 27,772.97

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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.