Home / 20,836.88-28,755.50-11,406.05

Finding the Fourth Proportional to 20,836.88, 28,755.50 and 11,406.05

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Solution

The fourth proportional to 20,836.88, 28,755.50 and 11,406.05 is: 15,740.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.88 : 28,755.50 = 11,406.05 : x
  2. Step 2: Convert to fraction form
    20,836.88/28,755.50 = 11,406.05/x
  3. Step 3: Cross multiply
    20,836.88x = 28,755.50 × 11,406.05
  4. Step 4: Simplify right side
    20,836.88x = 327,986,670.78
  5. Step 5: Solve for x
    x = 327,986,670.78/20,836.88
  6. Step 6: Final answer
    x = 15,740.68

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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.