Home / 21,081.32-31,632.92-9,391.81

Finding the Fourth Proportional to 21,081.32, 31,632.92 and 9,391.81

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Solution

The fourth proportional to 21,081.32, 31,632.92 and 9,391.81 is: 14,092.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.32 : 31,632.92 = 9,391.81 : x
  2. Step 2: Convert to fraction form
    21,081.32/31,632.92 = 9,391.81/x
  3. Step 3: Cross multiply
    21,081.32x = 31,632.92 × 9,391.81
  4. Step 4: Simplify right side
    21,081.32x = 297,090,374.39
  5. Step 5: Solve for x
    x = 297,090,374.39/21,081.32
  6. Step 6: Final answer
    x = 14,092.59

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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.