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Finding the Fourth Proportional to 8,975.70, 12,379.50 and 7,968.47

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Solution

The fourth proportional to 8,975.70, 12,379.50 and 7,968.47 is: 10,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,975.70 : 12,379.50 = 7,968.47 : x
  2. Step 2: Convert to fraction form
    8,975.70/12,379.50 = 7,968.47/x
  3. Step 3: Cross multiply
    8,975.70x = 12,379.50 × 7,968.47
  4. Step 4: Simplify right side
    8,975.70x = 98,645,674.37
  5. Step 5: Solve for x
    x = 98,645,674.37/8,975.70
  6. Step 6: Final answer
    x = 10,990.30

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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.