Home / 20,640.26-28,483.26-11,208.80

Finding the Fourth Proportional to 20,640.26, 28,483.26 and 11,208.80

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Solution

The fourth proportional to 20,640.26, 28,483.26 and 11,208.80 is: 15,467.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.26 : 28,483.26 = 11,208.80 : x
  2. Step 2: Convert to fraction form
    20,640.26/28,483.26 = 11,208.80/x
  3. Step 3: Cross multiply
    20,640.26x = 28,483.26 × 11,208.80
  4. Step 4: Simplify right side
    20,640.26x = 319,263,164.69
  5. Step 5: Solve for x
    x = 319,263,164.69/20,640.26
  6. Step 6: Final answer
    x = 15,467.98

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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.