Home / 11,619.94-17,430.10-4,219.78

Finding the Fourth Proportional to 11,619.94, 17,430.10 and 4,219.78

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Solution

The fourth proportional to 11,619.94, 17,430.10 and 4,219.78 is: 6,329.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,619.94 : 17,430.10 = 4,219.78 : x
  2. Step 2: Convert to fraction form
    11,619.94/17,430.10 = 4,219.78/x
  3. Step 3: Cross multiply
    11,619.94x = 17,430.10 × 4,219.78
  4. Step 4: Simplify right side
    11,619.94x = 73,551,187.38
  5. Step 5: Solve for x
    x = 73,551,187.38/11,619.94
  6. Step 6: Final answer
    x = 6,329.74

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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.