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Finding the Fourth Proportional to 7,139.64, 9,852.90 and 3,995.82

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Solution

The fourth proportional to 7,139.64, 9,852.90 and 3,995.82 is: 5,514.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.64 : 9,852.90 = 3,995.82 : x
  2. Step 2: Convert to fraction form
    7,139.64/9,852.90 = 3,995.82/x
  3. Step 3: Cross multiply
    7,139.64x = 9,852.90 × 3,995.82
  4. Step 4: Simplify right side
    7,139.64x = 39,370,414.88
  5. Step 5: Solve for x
    x = 39,370,414.88/7,139.64
  6. Step 6: Final answer
    x = 5,514.34

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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.