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Finding the Fourth Proportional to 12,295.68, 16,962.94 and 7,821.90

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Solution

The fourth proportional to 12,295.68, 16,962.94 and 7,821.90 is: 10,790.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,295.68 : 16,962.94 = 7,821.90 : x
  2. Step 2: Convert to fraction form
    12,295.68/16,962.94 = 7,821.90/x
  3. Step 3: Cross multiply
    12,295.68x = 16,962.94 × 7,821.90
  4. Step 4: Simplify right side
    12,295.68x = 132,682,420.39
  5. Step 5: Solve for x
    x = 132,682,420.39/12,295.68
  6. Step 6: Final answer
    x = 10,790.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.