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Finding the Fourth Proportional to 21,361.31, 29,478.72 and 11,801.07

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Solution

The fourth proportional to 21,361.31, 29,478.72 and 11,801.07 is: 16,285.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.31 : 29,478.72 = 11,801.07 : x
  2. Step 2: Convert to fraction form
    21,361.31/29,478.72 = 11,801.07/x
  3. Step 3: Cross multiply
    21,361.31x = 29,478.72 × 11,801.07
  4. Step 4: Simplify right side
    21,361.31x = 347,880,438.23
  5. Step 5: Solve for x
    x = 347,880,438.23/21,361.31
  6. Step 6: Final answer
    x = 16,285.54

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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.