Home / 20,628.25-28,468.39-11,675.72

Finding the Fourth Proportional to 20,628.25, 28,468.39 and 11,675.72

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Solution

The fourth proportional to 20,628.25, 28,468.39 and 11,675.72 is: 16,113.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.25 : 28,468.39 = 11,675.72 : x
  2. Step 2: Convert to fraction form
    20,628.25/28,468.39 = 11,675.72/x
  3. Step 3: Cross multiply
    20,628.25x = 28,468.39 × 11,675.72
  4. Step 4: Simplify right side
    20,628.25x = 332,388,950.49
  5. Step 5: Solve for x
    x = 332,388,950.49/20,628.25
  6. Step 6: Final answer
    x = 16,113.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.