Home / 21,621.24-32,431.83-9,138

Finding the Fourth Proportional to 21,621.24, 32,431.83 and 9,138

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Solution

The fourth proportional to 21,621.24, 32,431.83 and 9,138 is: 13,706.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.24 : 32,431.83 = 9,138 : x
  2. Step 2: Convert to fraction form
    21,621.24/32,431.83 = 9,138/x
  3. Step 3: Cross multiply
    21,621.24x = 32,431.83 × 9,138
  4. Step 4: Simplify right side
    21,621.24x = 296,362,062.54
  5. Step 5: Solve for x
    x = 296,362,062.54/21,621.24
  6. Step 6: Final answer
    x = 13,706.99

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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.