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Finding the Fourth Proportional to 28,608.80, 42,918.17 and 9,631.63

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Solution

The fourth proportional to 28,608.80, 42,918.17 and 9,631.63 is: 14,449.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,608.80 : 42,918.17 = 9,631.63 : x
  2. Step 2: Convert to fraction form
    28,608.80/42,918.17 = 9,631.63/x
  3. Step 3: Cross multiply
    28,608.80x = 42,918.17 × 9,631.63
  4. Step 4: Simplify right side
    28,608.80x = 413,371,933.72
  5. Step 5: Solve for x
    x = 413,371,933.72/28,608.80
  6. Step 6: Final answer
    x = 14,449.12

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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.