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Finding the Fourth Proportional to 28,212.80, 42,292.80 and 10,694.40

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Solution

The fourth proportional to 28,212.80, 42,292.80 and 10,694.40 is: 16,031.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.80 : 42,292.80 = 10,694.40 : x
  2. Step 2: Convert to fraction form
    28,212.80/42,292.80 = 10,694.40/x
  3. Step 3: Cross multiply
    28,212.80x = 42,292.80 × 10,694.40
  4. Step 4: Simplify right side
    28,212.80x = 452,296,120.32
  5. Step 5: Solve for x
    x = 452,296,120.32/28,212.80
  6. Step 6: Final answer
    x = 16,031.59

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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.