Home / 21,917.64-30,245.76-12,489.24

Finding the Fourth Proportional to 21,917.64, 30,245.76 and 12,489.24

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Solution

The fourth proportional to 21,917.64, 30,245.76 and 12,489.24 is: 17,234.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.64 : 30,245.76 = 12,489.24 : x
  2. Step 2: Convert to fraction form
    21,917.64/30,245.76 = 12,489.24/x
  3. Step 3: Cross multiply
    21,917.64x = 30,245.76 × 12,489.24
  4. Step 4: Simplify right side
    21,917.64x = 377,746,555.62
  5. Step 5: Solve for x
    x = 377,746,555.62/21,917.64
  6. Step 6: Final answer
    x = 17,234.82

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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.