Home / 20,428.22-30,646.20-7,100.72

Finding the Fourth Proportional to 20,428.22, 30,646.20 and 7,100.72

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Solution

The fourth proportional to 20,428.22, 30,646.20 and 7,100.72 is: 10,652.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.22 : 30,646.20 = 7,100.72 : x
  2. Step 2: Convert to fraction form
    20,428.22/30,646.20 = 7,100.72/x
  3. Step 3: Cross multiply
    20,428.22x = 30,646.20 × 7,100.72
  4. Step 4: Simplify right side
    20,428.22x = 217,609,896.53
  5. Step 5: Solve for x
    x = 217,609,896.53/20,428.22
  6. Step 6: Final answer
    x = 10,652.42

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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.