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Finding the Fourth Proportional to 28,438.92, 42,658.38 and 7,662.42

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Solution

The fourth proportional to 28,438.92, 42,658.38 and 7,662.42 is: 11,493.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.92 : 42,658.38 = 7,662.42 : x
  2. Step 2: Convert to fraction form
    28,438.92/42,658.38 = 7,662.42/x
  3. Step 3: Cross multiply
    28,438.92x = 42,658.38 × 7,662.42
  4. Step 4: Simplify right side
    28,438.92x = 326,866,424.08
  5. Step 5: Solve for x
    x = 326,866,424.08/28,438.92
  6. Step 6: Final answer
    x = 11,493.63

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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.