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Finding the Fourth Proportional to 21,528.31, 29,708.01 and 11,968.84

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Solution

The fourth proportional to 21,528.31, 29,708.01 and 11,968.84 is: 16,516.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,528.31 : 29,708.01 = 11,968.84 : x
  2. Step 2: Convert to fraction form
    21,528.31/29,708.01 = 11,968.84/x
  3. Step 3: Cross multiply
    21,528.31x = 29,708.01 × 11,968.84
  4. Step 4: Simplify right side
    21,528.31x = 355,570,418.41
  5. Step 5: Solve for x
    x = 355,570,418.41/21,528.31
  6. Step 6: Final answer
    x = 16,516.41

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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.