Home / 20,558.18-28,370.31-11,126.75

Finding the Fourth Proportional to 20,558.18, 28,370.31 and 11,126.75

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Solution

The fourth proportional to 20,558.18, 28,370.31 and 11,126.75 is: 15,354.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.18 : 28,370.31 = 11,126.75 : x
  2. Step 2: Convert to fraction form
    20,558.18/28,370.31 = 11,126.75/x
  3. Step 3: Cross multiply
    20,558.18x = 28,370.31 × 11,126.75
  4. Step 4: Simplify right side
    20,558.18x = 315,669,346.79
  5. Step 5: Solve for x
    x = 315,669,346.79/20,558.18
  6. Step 6: Final answer
    x = 15,354.93

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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.