Home / 20,943.88-28,902.55-11,512.64

Finding the Fourth Proportional to 20,943.88, 28,902.55 and 11,512.64

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Solution

The fourth proportional to 20,943.88, 28,902.55 and 11,512.64 is: 15,887.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.88 : 28,902.55 = 11,512.64 : x
  2. Step 2: Convert to fraction form
    20,943.88/28,902.55 = 11,512.64/x
  3. Step 3: Cross multiply
    20,943.88x = 28,902.55 × 11,512.64
  4. Step 4: Simplify right side
    20,943.88x = 332,744,653.23
  5. Step 5: Solve for x
    x = 332,744,653.23/20,943.88
  6. Step 6: Final answer
    x = 15,887.44

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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.