Home / 20,841.75-28,764.36-11,887.20

Finding the Fourth Proportional to 20,841.75, 28,764.36 and 11,887.20

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Solution

The fourth proportional to 20,841.75, 28,764.36 and 11,887.20 is: 16,405.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.75 : 28,764.36 = 11,887.20 : x
  2. Step 2: Convert to fraction form
    20,841.75/28,764.36 = 11,887.20/x
  3. Step 3: Cross multiply
    20,841.75x = 28,764.36 × 11,887.20
  4. Step 4: Simplify right side
    20,841.75x = 341,927,742.38
  5. Step 5: Solve for x
    x = 341,927,742.38/20,841.75
  6. Step 6: Final answer
    x = 16,405.90

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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.