Home / 20,313.53-28,031.82-11,815.67

Finding the Fourth Proportional to 20,313.53, 28,031.82 and 11,815.67

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Solution

The fourth proportional to 20,313.53, 28,031.82 and 11,815.67 is: 16,305.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,313.53 : 28,031.82 = 11,815.67 : x
  2. Step 2: Convert to fraction form
    20,313.53/28,031.82 = 11,815.67/x
  3. Step 3: Cross multiply
    20,313.53x = 28,031.82 × 11,815.67
  4. Step 4: Simplify right side
    20,313.53x = 331,214,826.85
  5. Step 5: Solve for x
    x = 331,214,826.85/20,313.53
  6. Step 6: Final answer
    x = 16,305.13

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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.