Home / 20,220-27,903.78-11,836.68

Finding the Fourth Proportional to 20,220, 27,903.78 and 11,836.68

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Solution

The fourth proportional to 20,220, 27,903.78 and 11,836.68 is: 16,334.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220 : 27,903.78 = 11,836.68 : x
  2. Step 2: Convert to fraction form
    20,220/27,903.78 = 11,836.68/x
  3. Step 3: Cross multiply
    20,220x = 27,903.78 × 11,836.68
  4. Step 4: Simplify right side
    20,220x = 330,288,114.65
  5. Step 5: Solve for x
    x = 330,288,114.65/20,220
  6. Step 6: Final answer
    x = 16,334.72

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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.