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Finding the Fourth Proportional to 21,337.96, 29,442.90 and 12,837.96

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Solution

The fourth proportional to 21,337.96, 29,442.90 and 12,837.96 is: 17,714.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.96 : 29,442.90 = 12,837.96 : x
  2. Step 2: Convert to fraction form
    21,337.96/29,442.90 = 12,837.96/x
  3. Step 3: Cross multiply
    21,337.96x = 29,442.90 × 12,837.96
  4. Step 4: Simplify right side
    21,337.96x = 377,986,772.48
  5. Step 5: Solve for x
    x = 377,986,772.48/21,337.96
  6. Step 6: Final answer
    x = 17,714.29

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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.