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Finding the Fourth Proportional to 21,058.59, 29,060.85 and 12,107.85

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Solution

The fourth proportional to 21,058.59, 29,060.85 and 12,107.85 is: 16,708.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,058.59 : 29,060.85 = 12,107.85 : x
  2. Step 2: Convert to fraction form
    21,058.59/29,060.85 = 12,107.85/x
  3. Step 3: Cross multiply
    21,058.59x = 29,060.85 × 12,107.85
  4. Step 4: Simplify right side
    21,058.59x = 351,864,412.67
  5. Step 5: Solve for x
    x = 351,864,412.67/21,058.59
  6. Step 6: Final answer
    x = 16,708.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.