Home / 20,790.40-28,698.96-12,835.84

Finding the Fourth Proportional to 20,790.40, 28,698.96 and 12,835.84

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Solution

The fourth proportional to 20,790.40, 28,698.96 and 12,835.84 is: 17,718.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.40 : 28,698.96 = 12,835.84 : x
  2. Step 2: Convert to fraction form
    20,790.40/28,698.96 = 12,835.84/x
  3. Step 3: Cross multiply
    20,790.40x = 28,698.96 × 12,835.84
  4. Step 4: Simplify right side
    20,790.40x = 368,375,258.73
  5. Step 5: Solve for x
    x = 368,375,258.73/20,790.40
  6. Step 6: Final answer
    x = 17,718.53

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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.