Home / 21,786.92-30,059.09-12,225.40

Finding the Fourth Proportional to 21,786.92, 30,059.09 and 12,225.40

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Solution

The fourth proportional to 21,786.92, 30,059.09 and 12,225.40 is: 16,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,786.92 : 30,059.09 = 12,225.40 : x
  2. Step 2: Convert to fraction form
    21,786.92/30,059.09 = 12,225.40/x
  3. Step 3: Cross multiply
    21,786.92x = 30,059.09 × 12,225.40
  4. Step 4: Simplify right side
    21,786.92x = 367,484,361.31
  5. Step 5: Solve for x
    x = 367,484,361.31/21,786.92
  6. Step 6: Final answer
    x = 16,867.20

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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.