Home / 21,231.39-31,851.62-7,190.93

Finding the Fourth Proportional to 21,231.39, 31,851.62 and 7,190.93

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Solution

The fourth proportional to 21,231.39, 31,851.62 and 7,190.93 is: 10,787.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.39 : 31,851.62 = 7,190.93 : x
  2. Step 2: Convert to fraction form
    21,231.39/31,851.62 = 7,190.93/x
  3. Step 3: Cross multiply
    21,231.39x = 31,851.62 × 7,190.93
  4. Step 4: Simplify right side
    21,231.39x = 229,042,574.59
  5. Step 5: Solve for x
    x = 229,042,574.59/21,231.39
  6. Step 6: Final answer
    x = 10,787.92

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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.