Home / 20,605.77-28,435.79-11,653.44

Finding the Fourth Proportional to 20,605.77, 28,435.79 and 11,653.44

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Solution

The fourth proportional to 20,605.77, 28,435.79 and 11,653.44 is: 16,081.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.77 : 28,435.79 = 11,653.44 : x
  2. Step 2: Convert to fraction form
    20,605.77/28,435.79 = 11,653.44/x
  3. Step 3: Cross multiply
    20,605.77x = 28,435.79 × 11,653.44
  4. Step 4: Simplify right side
    20,605.77x = 331,374,714.35
  5. Step 5: Solve for x
    x = 331,374,714.35/20,605.77
  6. Step 6: Final answer
    x = 16,081.65

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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.