Home / 18,115.70-27,170.42-4,788.81

Finding the Fourth Proportional to 18,115.70, 27,170.42 and 4,788.81

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Solution

The fourth proportional to 18,115.70, 27,170.42 and 4,788.81 is: 7,182.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.70 : 27,170.42 = 4,788.81 : x
  2. Step 2: Convert to fraction form
    18,115.70/27,170.42 = 4,788.81/x
  3. Step 3: Cross multiply
    18,115.70x = 27,170.42 × 4,788.81
  4. Step 4: Simplify right side
    18,115.70x = 130,113,955.06
  5. Step 5: Solve for x
    x = 130,113,955.06/18,115.70
  6. Step 6: Final answer
    x = 7,182.39

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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.