Home / 21,912.10-32,869.96-7,120.68

Finding the Fourth Proportional to 21,912.10, 32,869.96 and 7,120.68

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Solution

The fourth proportional to 21,912.10, 32,869.96 and 7,120.68 is: 10,681.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.10 : 32,869.96 = 7,120.68 : x
  2. Step 2: Convert to fraction form
    21,912.10/32,869.96 = 7,120.68/x
  3. Step 3: Cross multiply
    21,912.10x = 32,869.96 × 7,120.68
  4. Step 4: Simplify right side
    21,912.10x = 234,056,466.77
  5. Step 5: Solve for x
    x = 234,056,466.77/21,912.10
  6. Step 6: Final answer
    x = 10,681.61

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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.