Home / 20,742.12-28,624.86-11,790

Finding the Fourth Proportional to 20,742.12, 28,624.86 and 11,790

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Solution

The fourth proportional to 20,742.12, 28,624.86 and 11,790 is: 16,270.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.12 : 28,624.86 = 11,790 : x
  2. Step 2: Convert to fraction form
    20,742.12/28,624.86 = 11,790/x
  3. Step 3: Cross multiply
    20,742.12x = 28,624.86 × 11,790
  4. Step 4: Simplify right side
    20,742.12x = 337,487,099.40
  5. Step 5: Solve for x
    x = 337,487,099.40/20,742.12
  6. Step 6: Final answer
    x = 16,270.62

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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.