Home / 13,331.20-18,474.80-13,143.28

Finding the Fourth Proportional to 13,331.20, 18,474.80 and 13,143.28

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Solution

The fourth proportional to 13,331.20, 18,474.80 and 13,143.28 is: 18,214.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,331.20 : 18,474.80 = 13,143.28 : x
  2. Step 2: Convert to fraction form
    13,331.20/18,474.80 = 13,143.28/x
  3. Step 3: Cross multiply
    13,331.20x = 18,474.80 × 13,143.28
  4. Step 4: Simplify right side
    13,331.20x = 242,819,469.34
  5. Step 5: Solve for x
    x = 242,819,469.34/13,331.20
  6. Step 6: Final answer
    x = 18,214.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.