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Finding the Fourth Proportional to 31,488.92, 43,453.14 and 20,310.92

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Solution

The fourth proportional to 31,488.92, 43,453.14 and 20,310.92 is: 28,028.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,488.92 : 43,453.14 = 20,310.92 : x
  2. Step 2: Convert to fraction form
    31,488.92/43,453.14 = 20,310.92/x
  3. Step 3: Cross multiply
    31,488.92x = 43,453.14 × 20,310.92
  4. Step 4: Simplify right side
    31,488.92x = 882,573,250.29
  5. Step 5: Solve for x
    x = 882,573,250.29/31,488.92
  6. Step 6: Final answer
    x = 28,028.06

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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.