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Finding the Fourth Proportional to 31,397.92, 47,033.96 and 18,910.96

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Solution

The fourth proportional to 31,397.92, 47,033.96 and 18,910.96 is: 28,328.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,397.92 : 47,033.96 = 18,910.96 : x
  2. Step 2: Convert to fraction form
    31,397.92/47,033.96 = 18,910.96/x
  3. Step 3: Cross multiply
    31,397.92x = 47,033.96 × 18,910.96
  4. Step 4: Simplify right side
    31,397.92x = 889,457,336.20
  5. Step 5: Solve for x
    x = 889,457,336.20/31,397.92
  6. Step 6: Final answer
    x = 28,328.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.