Home / 13,412.28-20,120.34-4,179

Finding the Fourth Proportional to 13,412.28, 20,120.34 and 4,179

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Solution

The fourth proportional to 13,412.28, 20,120.34 and 4,179 is: 6,269.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.28 : 20,120.34 = 4,179 : x
  2. Step 2: Convert to fraction form
    13,412.28/20,120.34 = 4,179/x
  3. Step 3: Cross multiply
    13,412.28x = 20,120.34 × 4,179
  4. Step 4: Simplify right side
    13,412.28x = 84,082,900.86
  5. Step 5: Solve for x
    x = 84,082,900.86/13,412.28
  6. Step 6: Final answer
    x = 6,269.10

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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.