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Finding the Fourth Proportional to 8,472.68, 11,665.86 and 6,975.80

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Solution

The fourth proportional to 8,472.68, 11,665.86 and 6,975.80 is: 9,604.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.68 : 11,665.86 = 6,975.80 : x
  2. Step 2: Convert to fraction form
    8,472.68/11,665.86 = 6,975.80/x
  3. Step 3: Cross multiply
    8,472.68x = 11,665.86 × 6,975.80
  4. Step 4: Simplify right side
    8,472.68x = 81,378,706.19
  5. Step 5: Solve for x
    x = 81,378,706.19/8,472.68
  6. Step 6: Final answer
    x = 9,604.84

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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.