Home / 20,711.21-28,580.61-11,759.21

Finding the Fourth Proportional to 20,711.21, 28,580.61 and 11,759.21

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Solution

The fourth proportional to 20,711.21, 28,580.61 and 11,759.21 is: 16,227.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.21 : 28,580.61 = 11,759.21 : x
  2. Step 2: Convert to fraction form
    20,711.21/28,580.61 = 11,759.21/x
  3. Step 3: Cross multiply
    20,711.21x = 28,580.61 × 11,759.21
  4. Step 4: Simplify right side
    20,711.21x = 336,085,403.29
  5. Step 5: Solve for x
    x = 336,085,403.29/20,711.21
  6. Step 6: Final answer
    x = 16,227.22

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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.