Home / 20,559.76-28,372.66-11,128.52

Finding the Fourth Proportional to 20,559.76, 28,372.66 and 11,128.52

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Solution

The fourth proportional to 20,559.76, 28,372.66 and 11,128.52 is: 15,357.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.76 : 28,372.66 = 11,128.52 : x
  2. Step 2: Convert to fraction form
    20,559.76/28,372.66 = 11,128.52/x
  3. Step 3: Cross multiply
    20,559.76x = 28,372.66 × 11,128.52
  4. Step 4: Simplify right side
    20,559.76x = 315,745,714.26
  5. Step 5: Solve for x
    x = 315,745,714.26/20,559.76
  6. Step 6: Final answer
    x = 15,357.46

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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.