Home / 28,175.91-38,804.34-21,778.94

Finding the Fourth Proportional to 28,175.91, 38,804.34 and 21,778.94

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Solution

The fourth proportional to 28,175.91, 38,804.34 and 21,778.94 is: 29,994.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,175.91 : 38,804.34 = 21,778.94 : x
  2. Step 2: Convert to fraction form
    28,175.91/38,804.34 = 21,778.94/x
  3. Step 3: Cross multiply
    28,175.91x = 38,804.34 × 21,778.94
  4. Step 4: Simplify right side
    28,175.91x = 845,117,198.58
  5. Step 5: Solve for x
    x = 845,117,198.58/28,175.91
  6. Step 6: Final answer
    x = 29,994.32

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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.