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Finding the Fourth Proportional to 31,673.72, 43,710.90 and 20,495.72

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Solution

The fourth proportional to 31,673.72, 43,710.90 and 20,495.72 is: 28,284.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,673.72 : 43,710.90 = 20,495.72 : x
  2. Step 2: Convert to fraction form
    31,673.72/43,710.90 = 20,495.72/x
  3. Step 3: Cross multiply
    31,673.72x = 43,710.90 × 20,495.72
  4. Step 4: Simplify right side
    31,673.72x = 895,886,367.35
  5. Step 5: Solve for x
    x = 895,886,367.35/31,673.72
  6. Step 6: Final answer
    x = 28,284.85

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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.