Home / 20,640.06-28,483.03-11,208.69

Finding the Fourth Proportional to 20,640.06, 28,483.03 and 11,208.69

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Solution

The fourth proportional to 20,640.06, 28,483.03 and 11,208.69 is: 15,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.06 : 28,483.03 = 11,208.69 : x
  2. Step 2: Convert to fraction form
    20,640.06/28,483.03 = 11,208.69/x
  3. Step 3: Cross multiply
    20,640.06x = 28,483.03 × 11,208.69
  4. Step 4: Simplify right side
    20,640.06x = 319,257,453.53
  5. Step 5: Solve for x
    x = 319,257,453.53/20,640.06
  6. Step 6: Final answer
    x = 15,467.85

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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.