Home / 20,768.90-28,656.44-12,265.21

Finding the Fourth Proportional to 20,768.90, 28,656.44 and 12,265.21

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Solution

The fourth proportional to 20,768.90, 28,656.44 and 12,265.21 is: 16,923.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.90 : 28,656.44 = 12,265.21 : x
  2. Step 2: Convert to fraction form
    20,768.90/28,656.44 = 12,265.21/x
  3. Step 3: Cross multiply
    20,768.90x = 28,656.44 × 12,265.21
  4. Step 4: Simplify right side
    20,768.90x = 351,477,274.94
  5. Step 5: Solve for x
    x = 351,477,274.94/20,768.90
  6. Step 6: Final answer
    x = 16,923.25

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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.