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Finding the Fourth Proportional to 10,913, 16,369.50 and 2,705

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Solution

The fourth proportional to 10,913, 16,369.50 and 2,705 is: 4,057.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,913 : 16,369.50 = 2,705 : x
  2. Step 2: Convert to fraction form
    10,913/16,369.50 = 2,705/x
  3. Step 3: Cross multiply
    10,913x = 16,369.50 × 2,705
  4. Step 4: Simplify right side
    10,913x = 44,279,497.50
  5. Step 5: Solve for x
    x = 44,279,497.50/10,913
  6. Step 6: Final answer
    x = 4,057.50

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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.