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Finding the Fourth Proportional to 28,666.44, 42,990.87 and 9,942.12

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Solution

The fourth proportional to 28,666.44, 42,990.87 and 9,942.12 is: 14,910.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.44 : 42,990.87 = 9,942.12 : x
  2. Step 2: Convert to fraction form
    28,666.44/42,990.87 = 9,942.12/x
  3. Step 3: Cross multiply
    28,666.44x = 42,990.87 × 9,942.12
  4. Step 4: Simplify right side
    28,666.44x = 427,420,388.44
  5. Step 5: Solve for x
    x = 427,420,388.44/28,666.44
  6. Step 6: Final answer
    x = 14,910.13

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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.