Home / 19,981.40-27,556.53-12,900.38

Finding the Fourth Proportional to 19,981.40, 27,556.53 and 12,900.38

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Solution

The fourth proportional to 19,981.40, 27,556.53 and 12,900.38 is: 17,791.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.40 : 27,556.53 = 12,900.38 : x
  2. Step 2: Convert to fraction form
    19,981.40/27,556.53 = 12,900.38/x
  3. Step 3: Cross multiply
    19,981.40x = 27,556.53 × 12,900.38
  4. Step 4: Simplify right side
    19,981.40x = 355,489,570.70
  5. Step 5: Solve for x
    x = 355,489,570.70/19,981.40
  6. Step 6: Final answer
    x = 17,791.03

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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.