Home / 20,408.58-28,165.44-11,455.52

Finding the Fourth Proportional to 20,408.58, 28,165.44 and 11,455.52

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Solution

The fourth proportional to 20,408.58, 28,165.44 and 11,455.52 is: 15,809.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.58 : 28,165.44 = 11,455.52 : x
  2. Step 2: Convert to fraction form
    20,408.58/28,165.44 = 11,455.52/x
  3. Step 3: Cross multiply
    20,408.58x = 28,165.44 × 11,455.52
  4. Step 4: Simplify right side
    20,408.58x = 322,649,761.23
  5. Step 5: Solve for x
    x = 322,649,761.23/20,408.58
  6. Step 6: Final answer
    x = 15,809.52

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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.