Home / 13,431.92-20,146.28-3,571.92

Finding the Fourth Proportional to 13,431.92, 20,146.28 and 3,571.92

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Solution

The fourth proportional to 13,431.92, 20,146.28 and 3,571.92 is: 5,357.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.92 : 20,146.28 = 3,571.92 : x
  2. Step 2: Convert to fraction form
    13,431.92/20,146.28 = 3,571.92/x
  3. Step 3: Cross multiply
    13,431.92x = 20,146.28 × 3,571.92
  4. Step 4: Simplify right side
    13,431.92x = 71,960,900.46
  5. Step 5: Solve for x
    x = 71,960,900.46/13,431.92
  6. Step 6: Final answer
    x = 5,357.45

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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.