Home / 13,920.12-20,883.78-5,157.54

Finding the Fourth Proportional to 13,920.12, 20,883.78 and 5,157.54

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Solution

The fourth proportional to 13,920.12, 20,883.78 and 5,157.54 is: 7,737.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.12 : 20,883.78 = 5,157.54 : x
  2. Step 2: Convert to fraction form
    13,920.12/20,883.78 = 5,157.54/x
  3. Step 3: Cross multiply
    13,920.12x = 20,883.78 × 5,157.54
  4. Step 4: Simplify right side
    13,920.12x = 107,708,930.70
  5. Step 5: Solve for x
    x = 107,708,930.70/13,920.12
  6. Step 6: Final answer
    x = 7,737.64

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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.