Home / 21,913.60-32,872.22-7,122.18

Finding the Fourth Proportional to 21,913.60, 32,872.22 and 7,122.18

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Solution

The fourth proportional to 21,913.60, 32,872.22 and 7,122.18 is: 10,683.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.60 : 32,872.22 = 7,122.18 : x
  2. Step 2: Convert to fraction form
    21,913.60/32,872.22 = 7,122.18/x
  3. Step 3: Cross multiply
    21,913.60x = 32,872.22 × 7,122.18
  4. Step 4: Simplify right side
    21,913.60x = 234,121,867.84
  5. Step 5: Solve for x
    x = 234,121,867.84/21,913.60
  6. Step 6: Final answer
    x = 10,683.86

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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.