Home / 28,369.88-39,138.09-19,873.43

Finding the Fourth Proportional to 28,369.88, 39,138.09 and 19,873.43

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Solution

The fourth proportional to 28,369.88, 39,138.09 and 19,873.43 is: 27,416.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.88 : 39,138.09 = 19,873.43 : x
  2. Step 2: Convert to fraction form
    28,369.88/39,138.09 = 19,873.43/x
  3. Step 3: Cross multiply
    28,369.88x = 39,138.09 × 19,873.43
  4. Step 4: Simplify right side
    28,369.88x = 777,808,091.95
  5. Step 5: Solve for x
    x = 777,808,091.95/28,369.88
  6. Step 6: Final answer
    x = 27,416.69

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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.