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Finding the Fourth Proportional to 21,057.66, 29,059.11 and 11,497.19

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Solution

The fourth proportional to 21,057.66, 29,059.11 and 11,497.19 is: 15,865.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.66 : 29,059.11 = 11,497.19 : x
  2. Step 2: Convert to fraction form
    21,057.66/29,059.11 = 11,497.19/x
  3. Step 3: Cross multiply
    21,057.66x = 29,059.11 × 11,497.19
  4. Step 4: Simplify right side
    21,057.66x = 334,097,963.61
  5. Step 5: Solve for x
    x = 334,097,963.61/21,057.66
  6. Step 6: Final answer
    x = 15,865.86

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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.