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Finding the Fourth Proportional to 21,158.00, 29,190.29 and 12,660.35

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Solution

The fourth proportional to 21,158.00, 29,190.29 and 12,660.35 is: 17,466.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.00 : 29,190.29 = 12,660.35 : x
  2. Step 2: Convert to fraction form
    21,158.00/29,190.29 = 12,660.35/x
  3. Step 3: Cross multiply
    21,158.00x = 29,190.29 × 12,660.35
  4. Step 4: Simplify right side
    21,158.00x = 369,559,078.75
  5. Step 5: Solve for x
    x = 369,559,078.75/21,158.00
  6. Step 6: Final answer
    x = 17,466.64

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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.