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Finding the Fourth Proportional to 11,959.57, 17,939.36 and 8,641.81

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Solution

The fourth proportional to 11,959.57, 17,939.36 and 8,641.81 is: 12,962.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.57 : 17,939.36 = 8,641.81 : x
  2. Step 2: Convert to fraction form
    11,959.57/17,939.36 = 8,641.81/x
  3. Step 3: Cross multiply
    11,959.57x = 17,939.36 × 8,641.81
  4. Step 4: Simplify right side
    11,959.57x = 155,028,540.64
  5. Step 5: Solve for x
    x = 155,028,540.64/11,959.57
  6. Step 6: Final answer
    x = 12,962.72

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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.