Home / 13,420.14-20,119.62-8,479.35

Finding the Fourth Proportional to 13,420.14, 20,119.62 and 8,479.35

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Solution

The fourth proportional to 13,420.14, 20,119.62 and 8,479.35 is: 12,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.14 : 20,119.62 = 8,479.35 : x
  2. Step 2: Convert to fraction form
    13,420.14/20,119.62 = 8,479.35/x
  3. Step 3: Cross multiply
    13,420.14x = 20,119.62 × 8,479.35
  4. Step 4: Simplify right side
    13,420.14x = 170,601,299.85
  5. Step 5: Solve for x
    x = 170,601,299.85/13,420.14
  6. Step 6: Final answer
    x = 12,712.33

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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.