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Finding the Fourth Proportional to 18,965.19, 28,452.83 and 6,485.20

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Solution

The fourth proportional to 18,965.19, 28,452.83 and 6,485.20 is: 9,729.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.19 : 28,452.83 = 6,485.20 : x
  2. Step 2: Convert to fraction form
    18,965.19/28,452.83 = 6,485.20/x
  3. Step 3: Cross multiply
    18,965.19x = 28,452.83 × 6,485.20
  4. Step 4: Simplify right side
    18,965.19x = 184,522,150.85
  5. Step 5: Solve for x
    x = 184,522,150.85/18,965.19
  6. Step 6: Final answer
    x = 9,729.52

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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.