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Finding the Fourth Proportional to 30,805.92, 42,512.18 and 16,658.76

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Solution

The fourth proportional to 30,805.92, 42,512.18 and 16,658.76 is: 22,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,805.92 : 42,512.18 = 16,658.76 : x
  2. Step 2: Convert to fraction form
    30,805.92/42,512.18 = 16,658.76/x
  3. Step 3: Cross multiply
    30,805.92x = 42,512.18 × 16,658.76
  4. Step 4: Simplify right side
    30,805.92x = 708,200,120.40
  5. Step 5: Solve for x
    x = 708,200,120.40/30,805.92
  6. Step 6: Final answer
    x = 22,989.09

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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.