Home / 20,558.43-28,370.70-11,126.99

Finding the Fourth Proportional to 20,558.43, 28,370.70 and 11,126.99

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Solution

The fourth proportional to 20,558.43, 28,370.70 and 11,126.99 is: 15,355.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.43 : 28,370.70 = 11,126.99 : x
  2. Step 2: Convert to fraction form
    20,558.43/28,370.70 = 11,126.99/x
  3. Step 3: Cross multiply
    20,558.43x = 28,370.70 × 11,126.99
  4. Step 4: Simplify right side
    20,558.43x = 315,680,566.12
  5. Step 5: Solve for x
    x = 315,680,566.12/20,558.43
  6. Step 6: Final answer
    x = 15,355.29

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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.