Home / 20,913.19-28,860.65-11,481.75

Finding the Fourth Proportional to 20,913.19, 28,860.65 and 11,481.75

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Solution

The fourth proportional to 20,913.19, 28,860.65 and 11,481.75 is: 15,845.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.19 : 28,860.65 = 11,481.75 : x
  2. Step 2: Convert to fraction form
    20,913.19/28,860.65 = 11,481.75/x
  3. Step 3: Cross multiply
    20,913.19x = 28,860.65 × 11,481.75
  4. Step 4: Simplify right side
    20,913.19x = 331,370,818.37
  5. Step 5: Solve for x
    x = 331,370,818.37/20,913.19
  6. Step 6: Final answer
    x = 15,845.07

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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.