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Finding the Fourth Proportional to 7,042.26, 9,718.15 and 3,855.55

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Solution

The fourth proportional to 7,042.26, 9,718.15 and 3,855.55 is: 5,320.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,042.26 : 9,718.15 = 3,855.55 : x
  2. Step 2: Convert to fraction form
    7,042.26/9,718.15 = 3,855.55/x
  3. Step 3: Cross multiply
    7,042.26x = 9,718.15 × 3,855.55
  4. Step 4: Simplify right side
    7,042.26x = 37,468,813.23
  5. Step 5: Solve for x
    x = 37,468,813.23/7,042.26
  6. Step 6: Final answer
    x = 5,320.57

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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.