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Finding the Fourth Proportional to 12,169.79, 18,254.72 and 3,404.78

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Solution

The fourth proportional to 12,169.79, 18,254.72 and 3,404.78 is: 5,107.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.79 : 18,254.72 = 3,404.78 : x
  2. Step 2: Convert to fraction form
    12,169.79/18,254.72 = 3,404.78/x
  3. Step 3: Cross multiply
    12,169.79x = 18,254.72 × 3,404.78
  4. Step 4: Simplify right side
    12,169.79x = 62,153,197.26
  5. Step 5: Solve for x
    x = 62,153,197.26/12,169.79
  6. Step 6: Final answer
    x = 5,107.17

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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.