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Finding the Fourth Proportional to 21,490.40, 29,655.60 and 12,062

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Solution

The fourth proportional to 21,490.40, 29,655.60 and 12,062 is: 16,644.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.40 : 29,655.60 = 12,062 : x
  2. Step 2: Convert to fraction form
    21,490.40/29,655.60 = 12,062/x
  3. Step 3: Cross multiply
    21,490.40x = 29,655.60 × 12,062
  4. Step 4: Simplify right side
    21,490.40x = 357,705,847.20
  5. Step 5: Solve for x
    x = 357,705,847.20/21,490.40
  6. Step 6: Final answer
    x = 16,644.91

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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.