Home / 20,290.54-27,999.12-11,336.80

Finding the Fourth Proportional to 20,290.54, 27,999.12 and 11,336.80

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Solution

The fourth proportional to 20,290.54, 27,999.12 and 11,336.80 is: 15,643.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.54 : 27,999.12 = 11,336.80 : x
  2. Step 2: Convert to fraction form
    20,290.54/27,999.12 = 11,336.80/x
  3. Step 3: Cross multiply
    20,290.54x = 27,999.12 × 11,336.80
  4. Step 4: Simplify right side
    20,290.54x = 317,420,423.62
  5. Step 5: Solve for x
    x = 317,420,423.62/20,290.54
  6. Step 6: Final answer
    x = 15,643.76

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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.