Home / 20,284.16-30,428.66-7,137.86

Finding the Fourth Proportional to 20,284.16, 30,428.66 and 7,137.86

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Solution

The fourth proportional to 20,284.16, 30,428.66 and 7,137.86 is: 10,707.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,284.16 : 30,428.66 = 7,137.86 : x
  2. Step 2: Convert to fraction form
    20,284.16/30,428.66 = 7,137.86/x
  3. Step 3: Cross multiply
    20,284.16x = 30,428.66 × 7,137.86
  4. Step 4: Simplify right side
    20,284.16x = 217,195,380.77
  5. Step 5: Solve for x
    x = 217,195,380.77/20,284.16
  6. Step 6: Final answer
    x = 10,707.64

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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.