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Finding the Fourth Proportional to 20,676.66, 28,533.66 and 11,245.20

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Solution

The fourth proportional to 20,676.66, 28,533.66 and 11,245.20 is: 15,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.66 : 28,533.66 = 11,245.20 : x
  2. Step 2: Convert to fraction form
    20,676.66/28,533.66 = 11,245.20/x
  3. Step 3: Cross multiply
    20,676.66x = 28,533.66 × 11,245.20
  4. Step 4: Simplify right side
    20,676.66x = 320,866,713.43
  5. Step 5: Solve for x
    x = 320,866,713.43/20,676.66
  6. Step 6: Final answer
    x = 15,518.30

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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.