Home / 13,078.78-19,619.40-4,313.80

Finding the Fourth Proportional to 13,078.78, 19,619.40 and 4,313.80

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Solution

The fourth proportional to 13,078.78, 19,619.40 and 4,313.80 is: 6,471.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.78 : 19,619.40 = 4,313.80 : x
  2. Step 2: Convert to fraction form
    13,078.78/19,619.40 = 4,313.80/x
  3. Step 3: Cross multiply
    13,078.78x = 19,619.40 × 4,313.80
  4. Step 4: Simplify right side
    13,078.78x = 84,634,167.72
  5. Step 5: Solve for x
    x = 84,634,167.72/13,078.78
  6. Step 6: Final answer
    x = 6,471.11

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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.