Home / 13,615.49-18,791.42-8,313.36

Finding the Fourth Proportional to 13,615.49, 18,791.42 and 8,313.36

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Solution

The fourth proportional to 13,615.49, 18,791.42 and 8,313.36 is: 11,473.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.49 : 18,791.42 = 8,313.36 : x
  2. Step 2: Convert to fraction form
    13,615.49/18,791.42 = 8,313.36/x
  3. Step 3: Cross multiply
    13,615.49x = 18,791.42 × 8,313.36
  4. Step 4: Simplify right side
    13,615.49x = 156,219,797.80
  5. Step 5: Solve for x
    x = 156,219,797.80/13,615.49
  6. Step 6: Final answer
    x = 11,473.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.