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Finding the Fourth Proportional to 16,719.72, 23,072.90 and 9,165.72

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Solution

The fourth proportional to 16,719.72, 23,072.90 and 9,165.72 is: 12,648.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,719.72 : 23,072.90 = 9,165.72 : x
  2. Step 2: Convert to fraction form
    16,719.72/23,072.90 = 9,165.72/x
  3. Step 3: Cross multiply
    16,719.72x = 23,072.90 × 9,165.72
  4. Step 4: Simplify right side
    16,719.72x = 211,479,740.99
  5. Step 5: Solve for x
    x = 211,479,740.99/16,719.72
  6. Step 6: Final answer
    x = 12,648.52

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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.