Home / 20,679.96-28,536.14-12,181.58

Finding the Fourth Proportional to 20,679.96, 28,536.14 and 12,181.58

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Solution

The fourth proportional to 20,679.96, 28,536.14 and 12,181.58 is: 16,809.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.96 : 28,536.14 = 12,181.58 : x
  2. Step 2: Convert to fraction form
    20,679.96/28,536.14 = 12,181.58/x
  3. Step 3: Cross multiply
    20,679.96x = 28,536.14 × 12,181.58
  4. Step 4: Simplify right side
    20,679.96x = 347,615,272.30
  5. Step 5: Solve for x
    x = 347,615,272.30/20,679.96
  6. Step 6: Final answer
    x = 16,809.28

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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.