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Finding the Fourth Proportional to 18,935.98, 26,107.36 and 15,520.42

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Solution

The fourth proportional to 18,935.98, 26,107.36 and 15,520.42 is: 21,398.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,935.98 : 26,107.36 = 15,520.42 : x
  2. Step 2: Convert to fraction form
    18,935.98/26,107.36 = 15,520.42/x
  3. Step 3: Cross multiply
    18,935.98x = 26,107.36 × 15,520.42
  4. Step 4: Simplify right side
    18,935.98x = 405,196,984.15
  5. Step 5: Solve for x
    x = 405,196,984.15/18,935.98
  6. Step 6: Final answer
    x = 21,398.26

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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.