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Finding the Fourth Proportional to 12,151.97, 16,772.85 and 7,913.60

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Solution

The fourth proportional to 12,151.97, 16,772.85 and 7,913.60 is: 10,922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,151.97 : 16,772.85 = 7,913.60 : x
  2. Step 2: Convert to fraction form
    12,151.97/16,772.85 = 7,913.60/x
  3. Step 3: Cross multiply
    12,151.97x = 16,772.85 × 7,913.60
  4. Step 4: Simplify right side
    12,151.97x = 132,733,582.54
  5. Step 5: Solve for x
    x = 132,733,582.54/12,151.97
  6. Step 6: Final answer
    x = 10,922.80

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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.