Home / 20,558.18-28,370.32-11,126.72

Finding the Fourth Proportional to 20,558.18, 28,370.32 and 11,126.72

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Solution

The fourth proportional to 20,558.18, 28,370.32 and 11,126.72 is: 15,354.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.18 : 28,370.32 = 11,126.72 : x
  2. Step 2: Convert to fraction form
    20,558.18/28,370.32 = 11,126.72/x
  3. Step 3: Cross multiply
    20,558.18x = 28,370.32 × 11,126.72
  4. Step 4: Simplify right side
    20,558.18x = 315,668,606.95
  5. Step 5: Solve for x
    x = 315,668,606.95/20,558.18
  6. Step 6: Final answer
    x = 15,354.89

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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.