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Finding the Fourth Proportional to 18,107.91, 27,165.96 and 6,421.12

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Solution

The fourth proportional to 18,107.91, 27,165.96 and 6,421.12 is: 9,633.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,107.91 : 27,165.96 = 6,421.12 : x
  2. Step 2: Convert to fraction form
    18,107.91/27,165.96 = 6,421.12/x
  3. Step 3: Cross multiply
    18,107.91x = 27,165.96 × 6,421.12
  4. Step 4: Simplify right side
    18,107.91x = 174,435,821.16
  5. Step 5: Solve for x
    x = 174,435,821.16/18,107.91
  6. Step 6: Final answer
    x = 9,633.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.