Home / 21,405.75-32,121.60-9,093.75

Finding the Fourth Proportional to 21,405.75, 32,121.60 and 9,093.75

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Solution

The fourth proportional to 21,405.75, 32,121.60 and 9,093.75 is: 13,646.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.75 : 32,121.60 = 9,093.75 : x
  2. Step 2: Convert to fraction form
    21,405.75/32,121.60 = 9,093.75/x
  3. Step 3: Cross multiply
    21,405.75x = 32,121.60 × 9,093.75
  4. Step 4: Simplify right side
    21,405.75x = 292,105,800
  5. Step 5: Solve for x
    x = 292,105,800/21,405.75
  6. Step 6: Final answer
    x = 13,646.14

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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.