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Finding the Fourth Proportional to 13,412.80, 20,119.10 and 4,052.80

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Solution

The fourth proportional to 13,412.80, 20,119.10 and 4,052.80 is: 6,079.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.80 : 20,119.10 = 4,052.80 : x
  2. Step 2: Convert to fraction form
    13,412.80/20,119.10 = 4,052.80/x
  3. Step 3: Cross multiply
    13,412.80x = 20,119.10 × 4,052.80
  4. Step 4: Simplify right side
    13,412.80x = 81,538,688.48
  5. Step 5: Solve for x
    x = 81,538,688.48/13,412.80
  6. Step 6: Final answer
    x = 6,079.17

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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.