Home / 20,736.20-28,607.79-12,764.57

Finding the Fourth Proportional to 20,736.20, 28,607.79 and 12,764.57

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Solution

The fourth proportional to 20,736.20, 28,607.79 and 12,764.57 is: 17,610.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.20 : 28,607.79 = 12,764.57 : x
  2. Step 2: Convert to fraction form
    20,736.20/28,607.79 = 12,764.57/x
  3. Step 3: Cross multiply
    20,736.20x = 28,607.79 × 12,764.57
  4. Step 4: Simplify right side
    20,736.20x = 365,166,138.00
  5. Step 5: Solve for x
    x = 365,166,138.00/20,736.20
  6. Step 6: Final answer
    x = 17,610.08

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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.