Home / 21,917.42-30,246.36-12,485.78

Finding the Fourth Proportional to 21,917.42, 30,246.36 and 12,485.78

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Solution

The fourth proportional to 21,917.42, 30,246.36 and 12,485.78 is: 17,230.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.42 : 30,246.36 = 12,485.78 : x
  2. Step 2: Convert to fraction form
    21,917.42/30,246.36 = 12,485.78/x
  3. Step 3: Cross multiply
    21,917.42x = 30,246.36 × 12,485.78
  4. Step 4: Simplify right side
    21,917.42x = 377,649,382.36
  5. Step 5: Solve for x
    x = 377,649,382.36/21,917.42
  6. Step 6: Final answer
    x = 17,230.56

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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.