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Finding the Fourth Proportional to 7,917.98, 10,907.78 and 6,659.06

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Solution

The fourth proportional to 7,917.98, 10,907.78 and 6,659.06 is: 9,173.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.98 : 10,907.78 = 6,659.06 : x
  2. Step 2: Convert to fraction form
    7,917.98/10,907.78 = 6,659.06/x
  3. Step 3: Cross multiply
    7,917.98x = 10,907.78 × 6,659.06
  4. Step 4: Simplify right side
    7,917.98x = 72,635,473.65
  5. Step 5: Solve for x
    x = 72,635,473.65/7,917.98
  6. Step 6: Final answer
    x = 9,173.49

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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.