Home / 20,986.94-28,964.49-12,375.07

Finding the Fourth Proportional to 20,986.94, 28,964.49 and 12,375.07

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Solution

The fourth proportional to 20,986.94, 28,964.49 and 12,375.07 is: 17,079.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.94 : 28,964.49 = 12,375.07 : x
  2. Step 2: Convert to fraction form
    20,986.94/28,964.49 = 12,375.07/x
  3. Step 3: Cross multiply
    20,986.94x = 28,964.49 × 12,375.07
  4. Step 4: Simplify right side
    20,986.94x = 358,437,635.37
  5. Step 5: Solve for x
    x = 358,437,635.37/20,986.94
  6. Step 6: Final answer
    x = 17,079.08

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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.