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Finding the Fourth Proportional to 14,613, 20,165.94 and 7,989

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Solution

The fourth proportional to 14,613, 20,165.94 and 7,989 is: 11,024.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,613 : 20,165.94 = 7,989 : x
  2. Step 2: Convert to fraction form
    14,613/20,165.94 = 7,989/x
  3. Step 3: Cross multiply
    14,613x = 20,165.94 × 7,989
  4. Step 4: Simplify right side
    14,613x = 161,105,694.66
  5. Step 5: Solve for x
    x = 161,105,694.66/14,613
  6. Step 6: Final answer
    x = 11,024.82

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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.