Home / 18,982.72-28,457.87-13,418.56

Finding the Fourth Proportional to 18,982.72, 28,457.87 and 13,418.56

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Solution

The fourth proportional to 18,982.72, 28,457.87 and 13,418.56 is: 20,116.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982.72 : 28,457.87 = 13,418.56 : x
  2. Step 2: Convert to fraction form
    18,982.72/28,457.87 = 13,418.56/x
  3. Step 3: Cross multiply
    18,982.72x = 28,457.87 × 13,418.56
  4. Step 4: Simplify right side
    18,982.72x = 381,863,636.07
  5. Step 5: Solve for x
    x = 381,863,636.07/18,982.72
  6. Step 6: Final answer
    x = 20,116.38

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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.