Home / 18,969.96-28,423.80-13,396.28

Finding the Fourth Proportional to 18,969.96, 28,423.80 and 13,396.28

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Solution

The fourth proportional to 18,969.96, 28,423.80 and 13,396.28 is: 20,072.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.96 : 28,423.80 = 13,396.28 : x
  2. Step 2: Convert to fraction form
    18,969.96/28,423.80 = 13,396.28/x
  3. Step 3: Cross multiply
    18,969.96x = 28,423.80 × 13,396.28
  4. Step 4: Simplify right side
    18,969.96x = 380,773,183.46
  5. Step 5: Solve for x
    x = 380,773,183.46/18,969.96
  6. Step 6: Final answer
    x = 20,072.43

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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.