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Finding the Fourth Proportional to 7,042.10, 9,718.17 and 3,898.22

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Solution

The fourth proportional to 7,042.10, 9,718.17 and 3,898.22 is: 5,379.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,042.10 : 9,718.17 = 3,898.22 : x
  2. Step 2: Convert to fraction form
    7,042.10/9,718.17 = 3,898.22/x
  3. Step 3: Cross multiply
    7,042.10x = 9,718.17 × 3,898.22
  4. Step 4: Simplify right side
    7,042.10x = 37,883,564.66
  5. Step 5: Solve for x
    x = 37,883,564.66/7,042.10
  6. Step 6: Final answer
    x = 5,379.58

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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.