Home / 18,858.40-28,273.20-11,461.28

Finding the Fourth Proportional to 18,858.40, 28,273.20 and 11,461.28

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Solution

The fourth proportional to 18,858.40, 28,273.20 and 11,461.28 is: 17,183.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.40 : 28,273.20 = 11,461.28 : x
  2. Step 2: Convert to fraction form
    18,858.40/28,273.20 = 11,461.28/x
  3. Step 3: Cross multiply
    18,858.40x = 28,273.20 × 11,461.28
  4. Step 4: Simplify right side
    18,858.40x = 324,047,061.70
  5. Step 5: Solve for x
    x = 324,047,061.70/18,858.40
  6. Step 6: Final answer
    x = 17,183.17

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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.