Home / 18,986.32-28,485.57-9,126.31

Finding the Fourth Proportional to 18,986.32, 28,485.57 and 9,126.31

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Solution

The fourth proportional to 18,986.32, 28,485.57 and 9,126.31 is: 13,692.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.32 : 28,485.57 = 9,126.31 : x
  2. Step 2: Convert to fraction form
    18,986.32/28,485.57 = 9,126.31/x
  3. Step 3: Cross multiply
    18,986.32x = 28,485.57 × 9,126.31
  4. Step 4: Simplify right side
    18,986.32x = 259,968,142.35
  5. Step 5: Solve for x
    x = 259,968,142.35/18,986.32
  6. Step 6: Final answer
    x = 13,692.39

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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.