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Finding the Fourth Proportional to 29,653.44, 40,912.16 and 21,156.96

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Solution

The fourth proportional to 29,653.44, 40,912.16 and 21,156.96 is: 29,189.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,653.44 : 40,912.16 = 21,156.96 : x
  2. Step 2: Convert to fraction form
    29,653.44/40,912.16 = 21,156.96/x
  3. Step 3: Cross multiply
    29,653.44x = 40,912.16 × 21,156.96
  4. Step 4: Simplify right side
    29,653.44x = 865,576,932.63
  5. Step 5: Solve for x
    x = 865,576,932.63/29,653.44
  6. Step 6: Final answer
    x = 29,189.76

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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.