Home / 15,171.35-20,926.22-13,178.43

Finding the Fourth Proportional to 15,171.35, 20,926.22 and 13,178.43

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Solution

The fourth proportional to 15,171.35, 20,926.22 and 13,178.43 is: 18,177.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.35 : 20,926.22 = 13,178.43 : x
  2. Step 2: Convert to fraction form
    15,171.35/20,926.22 = 13,178.43/x
  3. Step 3: Cross multiply
    15,171.35x = 20,926.22 × 13,178.43
  4. Step 4: Simplify right side
    15,171.35x = 275,774,659.54
  5. Step 5: Solve for x
    x = 275,774,659.54/15,171.35
  6. Step 6: Final answer
    x = 18,177.34

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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.