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Finding the Fourth Proportional to 28,031.28, 42,046.92 and 8,310.12

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Solution

The fourth proportional to 28,031.28, 42,046.92 and 8,310.12 is: 12,465.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031.28 : 42,046.92 = 8,310.12 : x
  2. Step 2: Convert to fraction form
    28,031.28/42,046.92 = 8,310.12/x
  3. Step 3: Cross multiply
    28,031.28x = 42,046.92 × 8,310.12
  4. Step 4: Simplify right side
    28,031.28x = 349,414,950.83
  5. Step 5: Solve for x
    x = 349,414,950.83/28,031.28
  6. Step 6: Final answer
    x = 12,465.18

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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.