Home / 13,120.94-19,688.19-5,221.75

Finding the Fourth Proportional to 13,120.94, 19,688.19 and 5,221.75

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Solution

The fourth proportional to 13,120.94, 19,688.19 and 5,221.75 is: 7,835.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.94 : 19,688.19 = 5,221.75 : x
  2. Step 2: Convert to fraction form
    13,120.94/19,688.19 = 5,221.75/x
  3. Step 3: Cross multiply
    13,120.94x = 19,688.19 × 5,221.75
  4. Step 4: Simplify right side
    13,120.94x = 102,806,806.13
  5. Step 5: Solve for x
    x = 102,806,806.13/13,120.94
  6. Step 6: Final answer
    x = 7,835.32

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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.