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Finding the Fourth Proportional to 38,611.04, 57,921.12 and 12,306.56

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Solution

The fourth proportional to 38,611.04, 57,921.12 and 12,306.56 is: 18,461.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,611.04 : 57,921.12 = 12,306.56 : x
  2. Step 2: Convert to fraction form
    38,611.04/57,921.12 = 12,306.56/x
  3. Step 3: Cross multiply
    38,611.04x = 57,921.12 × 12,306.56
  4. Step 4: Simplify right side
    38,611.04x = 712,809,738.55
  5. Step 5: Solve for x
    x = 712,809,738.55/38,611.04
  6. Step 6: Final answer
    x = 18,461.29

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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.