Home / 28,738.88-39,684.60-21,198.32

Finding the Fourth Proportional to 28,738.88, 39,684.60 and 21,198.32

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Solution

The fourth proportional to 28,738.88, 39,684.60 and 21,198.32 is: 29,272.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,738.88 : 39,684.60 = 21,198.32 : x
  2. Step 2: Convert to fraction form
    28,738.88/39,684.60 = 21,198.32/x
  3. Step 3: Cross multiply
    28,738.88x = 39,684.60 × 21,198.32
  4. Step 4: Simplify right side
    28,738.88x = 841,246,849.87
  5. Step 5: Solve for x
    x = 841,246,849.87/28,738.88
  6. Step 6: Final answer
    x = 29,272.08

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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.