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Finding the Fourth Proportional to 7,042.46, 9,717.78 and 3,898.46

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Solution

The fourth proportional to 7,042.46, 9,717.78 and 3,898.46 is: 5,379.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,042.46 : 9,717.78 = 3,898.46 : x
  2. Step 2: Convert to fraction form
    7,042.46/9,717.78 = 3,898.46/x
  3. Step 3: Cross multiply
    7,042.46x = 9,717.78 × 3,898.46
  4. Step 4: Simplify right side
    7,042.46x = 37,884,376.62
  5. Step 5: Solve for x
    x = 37,884,376.62/7,042.46
  6. Step 6: Final answer
    x = 5,379.42

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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.