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Finding the Fourth Proportional to 31,491.68, 43,458 and 17,345.84

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Solution

The fourth proportional to 31,491.68, 43,458 and 17,345.84 is: 23,936.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,491.68 : 43,458 = 17,345.84 : x
  2. Step 2: Convert to fraction form
    31,491.68/43,458 = 17,345.84/x
  3. Step 3: Cross multiply
    31,491.68x = 43,458 × 17,345.84
  4. Step 4: Simplify right side
    31,491.68x = 753,815,514.72
  5. Step 5: Solve for x
    x = 753,815,514.72/31,491.68
  6. Step 6: Final answer
    x = 23,936.97

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Double scale
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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.