Home / 21,052.73-31,486.14-18,729.11

Finding the Fourth Proportional to 21,052.73, 31,486.14 and 18,729.11

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Solution

The fourth proportional to 21,052.73, 31,486.14 and 18,729.11 is: 28,010.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.73 : 31,486.14 = 18,729.11 : x
  2. Step 2: Convert to fraction form
    21,052.73/31,486.14 = 18,729.11/x
  3. Step 3: Cross multiply
    21,052.73x = 31,486.14 × 18,729.11
  4. Step 4: Simplify right side
    21,052.73x = 589,707,222.10
  5. Step 5: Solve for x
    x = 589,707,222.10/21,052.73
  6. Step 6: Final answer
    x = 28,010.97

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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.