Home / 20,961.60-28,924.80-11,529.60

Finding the Fourth Proportional to 20,961.60, 28,924.80 and 11,529.60

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Solution

The fourth proportional to 20,961.60, 28,924.80 and 11,529.60 is: 15,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.60 : 28,924.80 = 11,529.60 : x
  2. Step 2: Convert to fraction form
    20,961.60/28,924.80 = 11,529.60/x
  3. Step 3: Cross multiply
    20,961.60x = 28,924.80 × 11,529.60
  4. Step 4: Simplify right side
    20,961.60x = 333,491,374.08
  5. Step 5: Solve for x
    x = 333,491,374.08/20,961.60
  6. Step 6: Final answer
    x = 15,909.63

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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.