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Finding the Fourth Proportional to 31,486.91, 43,451.93 and 17,339.76

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Solution

The fourth proportional to 31,486.91, 43,451.93 and 17,339.76 is: 23,928.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,486.91 : 43,451.93 = 17,339.76 : x
  2. Step 2: Convert to fraction form
    31,486.91/43,451.93 = 17,339.76/x
  3. Step 3: Cross multiply
    31,486.91x = 43,451.93 × 17,339.76
  4. Step 4: Simplify right side
    31,486.91x = 753,446,081.09
  5. Step 5: Solve for x
    x = 753,446,081.09/31,486.91
  6. Step 6: Final answer
    x = 23,928.87

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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.