Home / 20,645.70-28,491.66-11,214.87

Finding the Fourth Proportional to 20,645.70, 28,491.66 and 11,214.87

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Solution

The fourth proportional to 20,645.70, 28,491.66 and 11,214.87 is: 15,476.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.70 : 28,491.66 = 11,214.87 : x
  2. Step 2: Convert to fraction form
    20,645.70/28,491.66 = 11,214.87/x
  3. Step 3: Cross multiply
    20,645.70x = 28,491.66 × 11,214.87
  4. Step 4: Simplify right side
    20,645.70x = 319,530,262.98
  5. Step 5: Solve for x
    x = 319,530,262.98/20,645.70
  6. Step 6: Final answer
    x = 15,476.84

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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.