Home / 20,640.30-28,483.61-11,208.86

Finding the Fourth Proportional to 20,640.30, 28,483.61 and 11,208.86

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Solution

The fourth proportional to 20,640.30, 28,483.61 and 11,208.86 is: 15,468.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.30 : 28,483.61 = 11,208.86 : x
  2. Step 2: Convert to fraction form
    20,640.30/28,483.61 = 11,208.86/x
  3. Step 3: Cross multiply
    20,640.30x = 28,483.61 × 11,208.86
  4. Step 4: Simplify right side
    20,640.30x = 319,268,796.78
  5. Step 5: Solve for x
    x = 319,268,796.78/20,640.30
  6. Step 6: Final answer
    x = 15,468.22

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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.