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Finding the Fourth Proportional to 13,801.78, 20,699.11 and 6,398.98

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Solution

The fourth proportional to 13,801.78, 20,699.11 and 6,398.98 is: 9,596.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,801.78 : 20,699.11 = 6,398.98 : x
  2. Step 2: Convert to fraction form
    13,801.78/20,699.11 = 6,398.98/x
  3. Step 3: Cross multiply
    13,801.78x = 20,699.11 × 6,398.98
  4. Step 4: Simplify right side
    13,801.78x = 132,453,190.91
  5. Step 5: Solve for x
    x = 132,453,190.91/13,801.78
  6. Step 6: Final answer
    x = 9,596.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.