Home / 20,311.70-28,031.54-11,359.31

Finding the Fourth Proportional to 20,311.70, 28,031.54 and 11,359.31

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Solution

The fourth proportional to 20,311.70, 28,031.54 and 11,359.31 is: 15,676.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.70 : 28,031.54 = 11,359.31 : x
  2. Step 2: Convert to fraction form
    20,311.70/28,031.54 = 11,359.31/x
  3. Step 3: Cross multiply
    20,311.70x = 28,031.54 × 11,359.31
  4. Step 4: Simplify right side
    20,311.70x = 318,418,755.68
  5. Step 5: Solve for x
    x = 318,418,755.68/20,311.70
  6. Step 6: Final answer
    x = 15,676.62

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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.