Home / 12,605.74-18,914-5,215.56

Finding the Fourth Proportional to 12,605.74, 18,914 and 5,215.56

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Solution

The fourth proportional to 12,605.74, 18,914 and 5,215.56 is: 7,825.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.74 : 18,914 = 5,215.56 : x
  2. Step 2: Convert to fraction form
    12,605.74/18,914 = 5,215.56/x
  3. Step 3: Cross multiply
    12,605.74x = 18,914 × 5,215.56
  4. Step 4: Simplify right side
    12,605.74x = 98,647,101.84
  5. Step 5: Solve for x
    x = 98,647,101.84/12,605.74
  6. Step 6: Final answer
    x = 7,825.57

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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.