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Finding the Fourth Proportional to 28,029.90, 42,049.26 and 8,310.42

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Solution

The fourth proportional to 28,029.90, 42,049.26 and 8,310.42 is: 12,466.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,029.90 : 42,049.26 = 8,310.42 : x
  2. Step 2: Convert to fraction form
    28,029.90/42,049.26 = 8,310.42/x
  3. Step 3: Cross multiply
    28,029.90x = 42,049.26 × 8,310.42
  4. Step 4: Simplify right side
    28,029.90x = 349,447,011.29
  5. Step 5: Solve for x
    x = 349,447,011.29/28,029.90
  6. Step 6: Final answer
    x = 12,466.94

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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.