Home / 20,824.18-28,736.70-11,392.12

Finding the Fourth Proportional to 20,824.18, 28,736.70 and 11,392.12

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Solution

The fourth proportional to 20,824.18, 28,736.70 and 11,392.12 is: 15,720.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.18 : 28,736.70 = 11,392.12 : x
  2. Step 2: Convert to fraction form
    20,824.18/28,736.70 = 11,392.12/x
  3. Step 3: Cross multiply
    20,824.18x = 28,736.70 × 11,392.12
  4. Step 4: Simplify right side
    20,824.18x = 327,371,934.80
  5. Step 5: Solve for x
    x = 327,371,934.80/20,824.18
  6. Step 6: Final answer
    x = 15,720.76

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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.