Home / 12,505.30-18,759.08-3,620.50

Finding the Fourth Proportional to 12,505.30, 18,759.08 and 3,620.50

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Solution

The fourth proportional to 12,505.30, 18,759.08 and 3,620.50 is: 5,431.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.30 : 18,759.08 = 3,620.50 : x
  2. Step 2: Convert to fraction form
    12,505.30/18,759.08 = 3,620.50/x
  3. Step 3: Cross multiply
    12,505.30x = 18,759.08 × 3,620.50
  4. Step 4: Simplify right side
    12,505.30x = 67,917,249.14
  5. Step 5: Solve for x
    x = 67,917,249.14/12,505.30
  6. Step 6: Final answer
    x = 5,431.08

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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.