Home / 20,426.40-28,195.20-12,873.60

Finding the Fourth Proportional to 20,426.40, 28,195.20 and 12,873.60

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Solution

The fourth proportional to 20,426.40, 28,195.20 and 12,873.60 is: 17,769.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.40 : 28,195.20 = 12,873.60 : x
  2. Step 2: Convert to fraction form
    20,426.40/28,195.20 = 12,873.60/x
  3. Step 3: Cross multiply
    20,426.40x = 28,195.20 × 12,873.60
  4. Step 4: Simplify right side
    20,426.40x = 362,973,726.72
  5. Step 5: Solve for x
    x = 362,973,726.72/20,426.40
  6. Step 6: Final answer
    x = 17,769.83

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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.