Home / 20,963.05-28,928.56-12,015.83

Finding the Fourth Proportional to 20,963.05, 28,928.56 and 12,015.83

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Solution

The fourth proportional to 20,963.05, 28,928.56 and 12,015.83 is: 16,581.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.05 : 28,928.56 = 12,015.83 : x
  2. Step 2: Convert to fraction form
    20,963.05/28,928.56 = 12,015.83/x
  3. Step 3: Cross multiply
    20,963.05x = 28,928.56 × 12,015.83
  4. Step 4: Simplify right side
    20,963.05x = 347,600,659.10
  5. Step 5: Solve for x
    x = 347,600,659.10/20,963.05
  6. Step 6: Final answer
    x = 16,581.59

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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.