Home / 21,273.29-31,861.29-10,187.81

Finding the Fourth Proportional to 21,273.29, 31,861.29 and 10,187.81

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Solution

The fourth proportional to 21,273.29, 31,861.29 and 10,187.81 is: 15,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.29 : 31,861.29 = 10,187.81 : x
  2. Step 2: Convert to fraction form
    21,273.29/31,861.29 = 10,187.81/x
  3. Step 3: Cross multiply
    21,273.29x = 31,861.29 × 10,187.81
  4. Step 4: Simplify right side
    21,273.29x = 324,596,768.87
  5. Step 5: Solve for x
    x = 324,596,768.87/21,273.29
  6. Step 6: Final answer
    x = 15,258.42

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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.