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Finding the Fourth Proportional to 38,406.52, 57,609.78 and 12,113.92

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Solution

The fourth proportional to 38,406.52, 57,609.78 and 12,113.92 is: 18,170.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,406.52 : 57,609.78 = 12,113.92 : x
  2. Step 2: Convert to fraction form
    38,406.52/57,609.78 = 12,113.92/x
  3. Step 3: Cross multiply
    38,406.52x = 57,609.78 × 12,113.92
  4. Step 4: Simplify right side
    38,406.52x = 697,880,266.14
  5. Step 5: Solve for x
    x = 697,880,266.14/38,406.52
  6. Step 6: Final answer
    x = 18,170.88

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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.