Home / 13,431.60-20,125.80-11,228.40

Finding the Fourth Proportional to 13,431.60, 20,125.80 and 11,228.40

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Solution

The fourth proportional to 13,431.60, 20,125.80 and 11,228.40 is: 16,824.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.60 : 20,125.80 = 11,228.40 : x
  2. Step 2: Convert to fraction form
    13,431.60/20,125.80 = 11,228.40/x
  3. Step 3: Cross multiply
    13,431.60x = 20,125.80 × 11,228.40
  4. Step 4: Simplify right side
    13,431.60x = 225,980,532.72
  5. Step 5: Solve for x
    x = 225,980,532.72/13,431.60
  6. Step 6: Final answer
    x = 16,824.54

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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.