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Finding the Fourth Proportional to 28,449.68, 42,676.80 and 7,672.88

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Solution

The fourth proportional to 28,449.68, 42,676.80 and 7,672.88 is: 11,509.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,449.68 : 42,676.80 = 7,672.88 : x
  2. Step 2: Convert to fraction form
    28,449.68/42,676.80 = 7,672.88/x
  3. Step 3: Cross multiply
    28,449.68x = 42,676.80 × 7,672.88
  4. Step 4: Simplify right side
    28,449.68x = 327,453,965.18
  5. Step 5: Solve for x
    x = 327,453,965.18/28,449.68
  6. Step 6: Final answer
    x = 11,509.93

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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.