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Finding the Fourth Proportional to 30,630.88, 45,938.72 and 8,443.28

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Solution

The fourth proportional to 30,630.88, 45,938.72 and 8,443.28 is: 12,662.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.88 : 45,938.72 = 8,443.28 : x
  2. Step 2: Convert to fraction form
    30,630.88/45,938.72 = 8,443.28/x
  3. Step 3: Cross multiply
    30,630.88x = 45,938.72 × 8,443.28
  4. Step 4: Simplify right side
    30,630.88x = 387,873,475.80
  5. Step 5: Solve for x
    x = 387,873,475.80/30,630.88
  6. Step 6: Final answer
    x = 12,662.83

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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.