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Finding the Fourth Proportional to 11,959.91, 17,939.65 and 5,381.45

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Solution

The fourth proportional to 11,959.91, 17,939.65 and 5,381.45 is: 8,072.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.91 : 17,939.65 = 5,381.45 : x
  2. Step 2: Convert to fraction form
    11,959.91/17,939.65 = 5,381.45/x
  3. Step 3: Cross multiply
    11,959.91x = 17,939.65 × 5,381.45
  4. Step 4: Simplify right side
    11,959.91x = 96,541,329.49
  5. Step 5: Solve for x
    x = 96,541,329.49/11,959.91
  6. Step 6: Final answer
    x = 8,072.08

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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.