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Finding the Fourth Proportional to 28,338.99, 42,514.56 and 8,619.15

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Solution

The fourth proportional to 28,338.99, 42,514.56 and 8,619.15 is: 12,930.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,338.99 : 42,514.56 = 8,619.15 : x
  2. Step 2: Convert to fraction form
    28,338.99/42,514.56 = 8,619.15/x
  3. Step 3: Cross multiply
    28,338.99x = 42,514.56 × 8,619.15
  4. Step 4: Simplify right side
    28,338.99x = 366,439,369.82
  5. Step 5: Solve for x
    x = 366,439,369.82/28,338.99
  6. Step 6: Final answer
    x = 12,930.57

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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.