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Finding the Fourth Proportional to 28,560.80, 42,825.84 and 8,830.88

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Solution

The fourth proportional to 28,560.80, 42,825.84 and 8,830.88 is: 13,241.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.80 : 42,825.84 = 8,830.88 : x
  2. Step 2: Convert to fraction form
    28,560.80/42,825.84 = 8,830.88/x
  3. Step 3: Cross multiply
    28,560.80x = 42,825.84 × 8,830.88
  4. Step 4: Simplify right side
    28,560.80x = 378,189,853.94
  5. Step 5: Solve for x
    x = 378,189,853.94/28,560.80
  6. Step 6: Final answer
    x = 13,241.57

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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.