Home / 20,986.62-28,955.03-11,910.50

Finding the Fourth Proportional to 20,986.62, 28,955.03 and 11,910.50

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Solution

The fourth proportional to 20,986.62, 28,955.03 and 11,910.50 is: 16,432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.62 : 28,955.03 = 11,910.50 : x
  2. Step 2: Convert to fraction form
    20,986.62/28,955.03 = 11,910.50/x
  3. Step 3: Cross multiply
    20,986.62x = 28,955.03 × 11,910.50
  4. Step 4: Simplify right side
    20,986.62x = 344,868,884.82
  5. Step 5: Solve for x
    x = 344,868,884.82/20,986.62
  6. Step 6: Final answer
    x = 16,432.80

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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.