Home / 20,963.18-28,928.72-12,015.96

Finding the Fourth Proportional to 20,963.18, 28,928.72 and 12,015.96

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Solution

The fourth proportional to 20,963.18, 28,928.72 and 12,015.96 is: 16,581.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.18 : 28,928.72 = 12,015.96 : x
  2. Step 2: Convert to fraction form
    20,963.18/28,928.72 = 12,015.96/x
  3. Step 3: Cross multiply
    20,963.18x = 28,928.72 × 12,015.96
  4. Step 4: Simplify right side
    20,963.18x = 347,606,263.93
  5. Step 5: Solve for x
    x = 347,606,263.93/20,963.18
  6. Step 6: Final answer
    x = 16,581.75

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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.