Home / 20,395.42-28,145.66-11,903.38

Finding the Fourth Proportional to 20,395.42, 28,145.66 and 11,903.38

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Solution

The fourth proportional to 20,395.42, 28,145.66 and 11,903.38 is: 16,426.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.42 : 28,145.66 = 11,903.38 : x
  2. Step 2: Convert to fraction form
    20,395.42/28,145.66 = 11,903.38/x
  3. Step 3: Cross multiply
    20,395.42x = 28,145.66 × 11,903.38
  4. Step 4: Simplify right side
    20,395.42x = 335,028,445.73
  5. Step 5: Solve for x
    x = 335,028,445.73/20,395.42
  6. Step 6: Final answer
    x = 16,426.65

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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.