Home / 10,912.14-16,368.82-3,120.75

Finding the Fourth Proportional to 10,912.14, 16,368.82 and 3,120.75

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Solution

The fourth proportional to 10,912.14, 16,368.82 and 3,120.75 is: 4,681.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.14 : 16,368.82 = 3,120.75 : x
  2. Step 2: Convert to fraction form
    10,912.14/16,368.82 = 3,120.75/x
  3. Step 3: Cross multiply
    10,912.14x = 16,368.82 × 3,120.75
  4. Step 4: Simplify right side
    10,912.14x = 51,082,987.21
  5. Step 5: Solve for x
    x = 51,082,987.21/10,912.14
  6. Step 6: Final answer
    x = 4,681.30

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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.