Home / 20,558.20-28,370.20-11,126.68

Finding the Fourth Proportional to 20,558.20, 28,370.20 and 11,126.68

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Solution

The fourth proportional to 20,558.20, 28,370.20 and 11,126.68 is: 15,354.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.20 : 28,370.20 = 11,126.68 : x
  2. Step 2: Convert to fraction form
    20,558.20/28,370.20 = 11,126.68/x
  3. Step 3: Cross multiply
    20,558.20x = 28,370.20 × 11,126.68
  4. Step 4: Simplify right side
    20,558.20x = 315,666,136.94
  5. Step 5: Solve for x
    x = 315,666,136.94/20,558.20
  6. Step 6: Final answer
    x = 15,354.76

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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.