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Finding the Fourth Proportional to 7,878.25, 11,801.39 and 3,655.56

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Solution

The fourth proportional to 7,878.25, 11,801.39 and 3,655.56 is: 5,475.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.25 : 11,801.39 = 3,655.56 : x
  2. Step 2: Convert to fraction form
    7,878.25/11,801.39 = 3,655.56/x
  3. Step 3: Cross multiply
    7,878.25x = 11,801.39 × 3,655.56
  4. Step 4: Simplify right side
    7,878.25x = 43,140,670.95
  5. Step 5: Solve for x
    x = 43,140,670.95/7,878.25
  6. Step 6: Final answer
    x = 5,475.92

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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.