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Finding the Fourth Proportional to 7,049.70, 9,725.22 and 4,215.42

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Solution

The fourth proportional to 7,049.70, 9,725.22 and 4,215.42 is: 5,815.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,049.70 : 9,725.22 = 4,215.42 : x
  2. Step 2: Convert to fraction form
    7,049.70/9,725.22 = 4,215.42/x
  3. Step 3: Cross multiply
    7,049.70x = 9,725.22 × 4,215.42
  4. Step 4: Simplify right side
    7,049.70x = 40,995,886.89
  5. Step 5: Solve for x
    x = 40,995,886.89/7,049.70
  6. Step 6: Final answer
    x = 5,815.27

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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.