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Finding the Fourth Proportional to 7,033.76, 9,706.08 and 3,890

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Solution

The fourth proportional to 7,033.76, 9,706.08 and 3,890 is: 5,367.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,033.76 : 9,706.08 = 3,890 : x
  2. Step 2: Convert to fraction form
    7,033.76/9,706.08 = 3,890/x
  3. Step 3: Cross multiply
    7,033.76x = 9,706.08 × 3,890
  4. Step 4: Simplify right side
    7,033.76x = 37,756,651.20
  5. Step 5: Solve for x
    x = 37,756,651.20/7,033.76
  6. Step 6: Final answer
    x = 5,367.92

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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.