Home / 20,850.57-28,777.14-11,898.45

Finding the Fourth Proportional to 20,850.57, 28,777.14 and 11,898.45

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Solution

The fourth proportional to 20,850.57, 28,777.14 and 11,898.45 is: 16,421.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.57 : 28,777.14 = 11,898.45 : x
  2. Step 2: Convert to fraction form
    20,850.57/28,777.14 = 11,898.45/x
  3. Step 3: Cross multiply
    20,850.57x = 28,777.14 × 11,898.45
  4. Step 4: Simplify right side
    20,850.57x = 342,403,361.43
  5. Step 5: Solve for x
    x = 342,403,361.43/20,850.57
  6. Step 6: Final answer
    x = 16,421.77

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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.