Home / 18,965.64-28,448.46-6,485.78

Finding the Fourth Proportional to 18,965.64, 28,448.46 and 6,485.78

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Solution

The fourth proportional to 18,965.64, 28,448.46 and 6,485.78 is: 9,728.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.64 : 28,448.46 = 6,485.78 : x
  2. Step 2: Convert to fraction form
    18,965.64/28,448.46 = 6,485.78/x
  3. Step 3: Cross multiply
    18,965.64x = 28,448.46 × 6,485.78
  4. Step 4: Simplify right side
    18,965.64x = 184,510,310.66
  5. Step 5: Solve for x
    x = 184,510,310.66/18,965.64
  6. Step 6: Final answer
    x = 9,728.66

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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.