Home / 20,511.99-28,308.54-12,013.56

Finding the Fourth Proportional to 20,511.99, 28,308.54 and 12,013.56

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Solution

The fourth proportional to 20,511.99, 28,308.54 and 12,013.56 is: 16,579.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.99 : 28,308.54 = 12,013.56 : x
  2. Step 2: Convert to fraction form
    20,511.99/28,308.54 = 12,013.56/x
  3. Step 3: Cross multiply
    20,511.99x = 28,308.54 × 12,013.56
  4. Step 4: Simplify right side
    20,511.99x = 340,086,343.80
  5. Step 5: Solve for x
    x = 340,086,343.80/20,511.99
  6. Step 6: Final answer
    x = 16,579.88

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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.