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Finding the Fourth Proportional to 30,507.80, 45,754.22 and 8,321.28

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Solution

The fourth proportional to 30,507.80, 45,754.22 and 8,321.28 is: 12,479.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,507.80 : 45,754.22 = 8,321.28 : x
  2. Step 2: Convert to fraction form
    30,507.80/45,754.22 = 8,321.28/x
  3. Step 3: Cross multiply
    30,507.80x = 45,754.22 × 8,321.28
  4. Step 4: Simplify right side
    30,507.80x = 380,733,675.80
  5. Step 5: Solve for x
    x = 380,733,675.80/30,507.80
  6. Step 6: Final answer
    x = 12,479.88

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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.