Home / 21,839.14-30,098.05-15,860.43

Finding the Fourth Proportional to 21,839.14, 30,098.05 and 15,860.43

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Solution

The fourth proportional to 21,839.14, 30,098.05 and 15,860.43 is: 21,858.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.14 : 30,098.05 = 15,860.43 : x
  2. Step 2: Convert to fraction form
    21,839.14/30,098.05 = 15,860.43/x
  3. Step 3: Cross multiply
    21,839.14x = 30,098.05 × 15,860.43
  4. Step 4: Simplify right side
    21,839.14x = 477,367,975.51
  5. Step 5: Solve for x
    x = 477,367,975.51/21,839.14
  6. Step 6: Final answer
    x = 21,858.37

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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.