Home / 13,438.54-20,157.81-7,321.42

Finding the Fourth Proportional to 13,438.54, 20,157.81 and 7,321.42

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Solution

The fourth proportional to 13,438.54, 20,157.81 and 7,321.42 is: 10,982.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.54 : 20,157.81 = 7,321.42 : x
  2. Step 2: Convert to fraction form
    13,438.54/20,157.81 = 7,321.42/x
  3. Step 3: Cross multiply
    13,438.54x = 20,157.81 × 7,321.42
  4. Step 4: Simplify right side
    13,438.54x = 147,583,793.29
  5. Step 5: Solve for x
    x = 147,583,793.29/13,438.54
  6. Step 6: Final answer
    x = 10,982.13

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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.