Home / 21,081.47-31,623.21-6,291.54

Finding the Fourth Proportional to 21,081.47, 31,623.21 and 6,291.54

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Solution

The fourth proportional to 21,081.47, 31,623.21 and 6,291.54 is: 9,437.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.47 : 31,623.21 = 6,291.54 : x
  2. Step 2: Convert to fraction form
    21,081.47/31,623.21 = 6,291.54/x
  3. Step 3: Cross multiply
    21,081.47x = 31,623.21 × 6,291.54
  4. Step 4: Simplify right side
    21,081.47x = 198,958,690.64
  5. Step 5: Solve for x
    x = 198,958,690.64/21,081.47
  6. Step 6: Final answer
    x = 9,437.61

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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.