Home / 20,961.46-28,928.73-12,011.86

Finding the Fourth Proportional to 20,961.46, 28,928.73 and 12,011.86

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Solution

The fourth proportional to 20,961.46, 28,928.73 and 12,011.86 is: 16,577.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.46 : 28,928.73 = 12,011.86 : x
  2. Step 2: Convert to fraction form
    20,961.46/28,928.73 = 12,011.86/x
  3. Step 3: Cross multiply
    20,961.46x = 28,928.73 × 12,011.86
  4. Step 4: Simplify right side
    20,961.46x = 347,487,854.74
  5. Step 5: Solve for x
    x = 347,487,854.74/20,961.46
  6. Step 6: Final answer
    x = 16,577.46

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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.