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Finding the Fourth Proportional to 65,628.80, 98,439.76 and 18,879.84

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Solution

The fourth proportional to 65,628.80, 98,439.76 and 18,879.84 is: 28,318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,628.80 : 98,439.76 = 18,879.84 : x
  2. Step 2: Convert to fraction form
    65,628.80/98,439.76 = 18,879.84/x
  3. Step 3: Cross multiply
    65,628.80x = 98,439.76 × 18,879.84
  4. Step 4: Simplify right side
    65,628.80x = 1,858,526,918.44
  5. Step 5: Solve for x
    x = 1,858,526,918.44/65,628.80
  6. Step 6: Final answer
    x = 28,318.77

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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.