Home / 20,396.64-28,138.62-11,898.12

Finding the Fourth Proportional to 20,396.64, 28,138.62 and 11,898.12

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Solution

The fourth proportional to 20,396.64, 28,138.62 and 11,898.12 is: 16,414.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.64 : 28,138.62 = 11,898.12 : x
  2. Step 2: Convert to fraction form
    20,396.64/28,138.62 = 11,898.12/x
  3. Step 3: Cross multiply
    20,396.64x = 28,138.62 × 11,898.12
  4. Step 4: Simplify right side
    20,396.64x = 334,796,677.39
  5. Step 5: Solve for x
    x = 334,796,677.39/20,396.64
  6. Step 6: Final answer
    x = 16,414.31

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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.