Home / 20,617.78-30,882.90-13,958.38

Finding the Fourth Proportional to 20,617.78, 30,882.90 and 13,958.38

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Solution

The fourth proportional to 20,617.78, 30,882.90 and 13,958.38 is: 20,907.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.78 : 30,882.90 = 13,958.38 : x
  2. Step 2: Convert to fraction form
    20,617.78/30,882.90 = 13,958.38/x
  3. Step 3: Cross multiply
    20,617.78x = 30,882.90 × 13,958.38
  4. Step 4: Simplify right side
    20,617.78x = 431,075,253.70
  5. Step 5: Solve for x
    x = 431,075,253.70/20,617.78
  6. Step 6: Final answer
    x = 20,907.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.