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Finding the Fourth Proportional to 12,160.59, 18,240.93 and 9,391.29

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Solution

The fourth proportional to 12,160.59, 18,240.93 and 9,391.29 is: 14,086.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,160.59 : 18,240.93 = 9,391.29 : x
  2. Step 2: Convert to fraction form
    12,160.59/18,240.93 = 9,391.29/x
  3. Step 3: Cross multiply
    12,160.59x = 18,240.93 × 9,391.29
  4. Step 4: Simplify right side
    12,160.59x = 171,305,863.50
  5. Step 5: Solve for x
    x = 171,305,863.50/12,160.59
  6. Step 6: Final answer
    x = 14,086.97

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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.