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Finding the Fourth Proportional to 28,459.68, 42,691.68 and 7,682.88

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Solution

The fourth proportional to 28,459.68, 42,691.68 and 7,682.88 is: 11,524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,459.68 : 42,691.68 = 7,682.88 : x
  2. Step 2: Convert to fraction form
    28,459.68/42,691.68 = 7,682.88/x
  3. Step 3: Cross multiply
    28,459.68x = 42,691.68 × 7,682.88
  4. Step 4: Simplify right side
    28,459.68x = 327,995,054.44
  5. Step 5: Solve for x
    x = 327,995,054.44/28,459.68
  6. Step 6: Final answer
    x = 11,524.90

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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.