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Finding the Fourth Proportional to 7,903.46, 11,855.19 and 7,422.32

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Solution

The fourth proportional to 7,903.46, 11,855.19 and 7,422.32 is: 11,133.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.46 : 11,855.19 = 7,422.32 : x
  2. Step 2: Convert to fraction form
    7,903.46/11,855.19 = 7,422.32/x
  3. Step 3: Cross multiply
    7,903.46x = 11,855.19 × 7,422.32
  4. Step 4: Simplify right side
    7,903.46x = 87,992,954.56
  5. Step 5: Solve for x
    x = 87,992,954.56/7,903.46
  6. Step 6: Final answer
    x = 11,133.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.