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Finding the Fourth Proportional to 20,624.41, 30,936.61 and 7,476.79

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Solution

The fourth proportional to 20,624.41, 30,936.61 and 7,476.79 is: 11,215.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,624.41 : 30,936.61 = 7,476.79 : x
  2. Step 2: Convert to fraction form
    20,624.41/30,936.61 = 7,476.79/x
  3. Step 3: Cross multiply
    20,624.41x = 30,936.61 × 7,476.79
  4. Step 4: Simplify right side
    20,624.41x = 231,306,536.28
  5. Step 5: Solve for x
    x = 231,306,536.28/20,624.41
  6. Step 6: Final answer
    x = 11,215.18

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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.