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Finding the Fourth Proportional to 21,361.98, 29,477.73 and 11,930.34

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Solution

The fourth proportional to 21,361.98, 29,477.73 and 11,930.34 is: 16,462.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.98 : 29,477.73 = 11,930.34 : x
  2. Step 2: Convert to fraction form
    21,361.98/29,477.73 = 11,930.34/x
  3. Step 3: Cross multiply
    21,361.98x = 29,477.73 × 11,930.34
  4. Step 4: Simplify right side
    21,361.98x = 351,679,341.33
  5. Step 5: Solve for x
    x = 351,679,341.33/21,361.98
  6. Step 6: Final answer
    x = 16,462.86

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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.