Home / 18,975.79-28,464.45-7,128.37

Finding the Fourth Proportional to 18,975.79, 28,464.45 and 7,128.37

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Solution

The fourth proportional to 18,975.79, 28,464.45 and 7,128.37 is: 10,692.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,975.79 : 28,464.45 = 7,128.37 : x
  2. Step 2: Convert to fraction form
    18,975.79/28,464.45 = 7,128.37/x
  3. Step 3: Cross multiply
    18,975.79x = 28,464.45 × 7,128.37
  4. Step 4: Simplify right side
    18,975.79x = 202,905,131.45
  5. Step 5: Solve for x
    x = 202,905,131.45/18,975.79
  6. Step 6: Final answer
    x = 10,692.84

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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.