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Finding the Fourth Proportional to 21,264.70, 29,345.05 and 11,704.38

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Solution

The fourth proportional to 21,264.70, 29,345.05 and 11,704.38 is: 16,151.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,264.70 : 29,345.05 = 11,704.38 : x
  2. Step 2: Convert to fraction form
    21,264.70/29,345.05 = 11,704.38/x
  3. Step 3: Cross multiply
    21,264.70x = 29,345.05 × 11,704.38
  4. Step 4: Simplify right side
    21,264.70x = 343,465,718.94
  5. Step 5: Solve for x
    x = 343,465,718.94/21,264.70
  6. Step 6: Final answer
    x = 16,151.92

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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.