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Finding the Fourth Proportional to 28,134.80, 42,175.80 and 10,616.40

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Solution

The fourth proportional to 28,134.80, 42,175.80 and 10,616.40 is: 15,914.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,134.80 : 42,175.80 = 10,616.40 : x
  2. Step 2: Convert to fraction form
    28,134.80/42,175.80 = 10,616.40/x
  3. Step 3: Cross multiply
    28,134.80x = 42,175.80 × 10,616.40
  4. Step 4: Simplify right side
    28,134.80x = 447,755,163.12
  5. Step 5: Solve for x
    x = 447,755,163.12/28,134.80
  6. Step 6: Final answer
    x = 15,914.64

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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.