Home / 7,878.67-11,821.39-2,947.68

Finding the Fourth Proportional to 7,878.67, 11,821.39 and 2,947.68

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Solution

The fourth proportional to 7,878.67, 11,821.39 and 2,947.68 is: 4,422.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.67 : 11,821.39 = 2,947.68 : x
  2. Step 2: Convert to fraction form
    7,878.67/11,821.39 = 2,947.68/x
  3. Step 3: Cross multiply
    7,878.67x = 11,821.39 × 2,947.68
  4. Step 4: Simplify right side
    7,878.67x = 34,845,667.51
  5. Step 5: Solve for x
    x = 34,845,667.51/7,878.67
  6. Step 6: Final answer
    x = 4,422.79

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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.