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Finding the Fourth Proportional to 7,179.78, 9,907.93 and 4,196.35

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Solution

The fourth proportional to 7,179.78, 9,907.93 and 4,196.35 is: 5,790.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,179.78 : 9,907.93 = 4,196.35 : x
  2. Step 2: Convert to fraction form
    7,179.78/9,907.93 = 4,196.35/x
  3. Step 3: Cross multiply
    7,179.78x = 9,907.93 × 4,196.35
  4. Step 4: Simplify right side
    7,179.78x = 41,577,142.06
  5. Step 5: Solve for x
    x = 41,577,142.06/7,179.78
  6. Step 6: Final answer
    x = 5,790.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.