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Finding the Fourth Proportional to 6,890.64, 9,514.56 and 4,239.54

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Solution

The fourth proportional to 6,890.64, 9,514.56 and 4,239.54 is: 5,853.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890.64 : 9,514.56 = 4,239.54 : x
  2. Step 2: Convert to fraction form
    6,890.64/9,514.56 = 4,239.54/x
  3. Step 3: Cross multiply
    6,890.64x = 9,514.56 × 4,239.54
  4. Step 4: Simplify right side
    6,890.64x = 40,337,357.70
  5. Step 5: Solve for x
    x = 40,337,357.70/6,890.64
  6. Step 6: Final answer
    x = 5,853.93

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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.