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Finding the Fourth Proportional to 12,939.91, 17,854.89 and 7,273.90

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Solution

The fourth proportional to 12,939.91, 17,854.89 and 7,273.90 is: 10,036.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.91 : 17,854.89 = 7,273.90 : x
  2. Step 2: Convert to fraction form
    12,939.91/17,854.89 = 7,273.90/x
  3. Step 3: Cross multiply
    12,939.91x = 17,854.89 × 7,273.90
  4. Step 4: Simplify right side
    12,939.91x = 129,874,679.41
  5. Step 5: Solve for x
    x = 129,874,679.41/12,939.91
  6. Step 6: Final answer
    x = 10,036.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.