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Finding the Fourth Proportional to 30,659.68, 45,982.23 and 8,472.57

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Solution

The fourth proportional to 30,659.68, 45,982.23 and 8,472.57 is: 12,706.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,659.68 : 45,982.23 = 8,472.57 : x
  2. Step 2: Convert to fraction form
    30,659.68/45,982.23 = 8,472.57/x
  3. Step 3: Cross multiply
    30,659.68x = 45,982.23 × 8,472.57
  4. Step 4: Simplify right side
    30,659.68x = 389,587,662.43
  5. Step 5: Solve for x
    x = 389,587,662.43/30,659.68
  6. Step 6: Final answer
    x = 12,706.84

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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.