Home / 13,455.75-20,186.87-4,221.75

Finding the Fourth Proportional to 13,455.75, 20,186.87 and 4,221.75

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Solution

The fourth proportional to 13,455.75, 20,186.87 and 4,221.75 is: 6,333.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.75 : 20,186.87 = 4,221.75 : x
  2. Step 2: Convert to fraction form
    13,455.75/20,186.87 = 4,221.75/x
  3. Step 3: Cross multiply
    13,455.75x = 20,186.87 × 4,221.75
  4. Step 4: Simplify right side
    13,455.75x = 85,223,897.31
  5. Step 5: Solve for x
    x = 85,223,897.31/13,455.75
  6. Step 6: Final answer
    x = 6,333.64

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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.