Home / 22,811.45-31,480.69-13,120.88

Finding the Fourth Proportional to 22,811.45, 31,480.69 and 13,120.88

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Solution

The fourth proportional to 22,811.45, 31,480.69 and 13,120.88 is: 18,107.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,811.45 : 31,480.69 = 13,120.88 : x
  2. Step 2: Convert to fraction form
    22,811.45/31,480.69 = 13,120.88/x
  3. Step 3: Cross multiply
    22,811.45x = 31,480.69 × 13,120.88
  4. Step 4: Simplify right side
    22,811.45x = 413,054,355.81
  5. Step 5: Solve for x
    x = 413,054,355.81/22,811.45
  6. Step 6: Final answer
    x = 18,107.33

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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.