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Finding the Fourth Proportional to 30,390.66, 41,934.06 and 20,302.92

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Solution

The fourth proportional to 30,390.66, 41,934.06 and 20,302.92 is: 28,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.66 : 41,934.06 = 20,302.92 : x
  2. Step 2: Convert to fraction form
    30,390.66/41,934.06 = 20,302.92/x
  3. Step 3: Cross multiply
    30,390.66x = 41,934.06 × 20,302.92
  4. Step 4: Simplify right side
    30,390.66x = 851,383,865.46
  5. Step 5: Solve for x
    x = 851,383,865.46/30,390.66
  6. Step 6: Final answer
    x = 28,014.66

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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.