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Finding the Fourth Proportional to 12,128.94, 16,737.77 and 6,823.78

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Solution

The fourth proportional to 12,128.94, 16,737.77 and 6,823.78 is: 9,416.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.94 : 16,737.77 = 6,823.78 : x
  2. Step 2: Convert to fraction form
    12,128.94/16,737.77 = 6,823.78/x
  3. Step 3: Cross multiply
    12,128.94x = 16,737.77 × 6,823.78
  4. Step 4: Simplify right side
    12,128.94x = 114,214,835.39
  5. Step 5: Solve for x
    x = 114,214,835.39/12,128.94
  6. Step 6: Final answer
    x = 9,416.72

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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.