Home / 13,455.09-20,185.88-4,221.09

Finding the Fourth Proportional to 13,455.09, 20,185.88 and 4,221.09

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Solution

The fourth proportional to 13,455.09, 20,185.88 and 4,221.09 is: 6,332.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.09 : 20,185.88 = 4,221.09 : x
  2. Step 2: Convert to fraction form
    13,455.09/20,185.88 = 4,221.09/x
  3. Step 3: Cross multiply
    13,455.09x = 20,185.88 × 4,221.09
  4. Step 4: Simplify right side
    13,455.09x = 85,206,395.10
  5. Step 5: Solve for x
    x = 85,206,395.10/13,455.09
  6. Step 6: Final answer
    x = 6,332.65

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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.