Home / 13,390.99-20,078.96-5,491.33

Finding the Fourth Proportional to 13,390.99, 20,078.96 and 5,491.33

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Solution

The fourth proportional to 13,390.99, 20,078.96 and 5,491.33 is: 8,233.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.99 : 20,078.96 = 5,491.33 : x
  2. Step 2: Convert to fraction form
    13,390.99/20,078.96 = 5,491.33/x
  3. Step 3: Cross multiply
    13,390.99x = 20,078.96 × 5,491.33
  4. Step 4: Simplify right side
    13,390.99x = 110,260,167.96
  5. Step 5: Solve for x
    x = 110,260,167.96/13,390.99
  6. Step 6: Final answer
    x = 8,233.91

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1.5x scale

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.