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Finding the Fourth Proportional to 12,065.76, 16,660.08 and 7,879.68

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Solution

The fourth proportional to 12,065.76, 16,660.08 and 7,879.68 is: 10,880.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,065.76 : 16,660.08 = 7,879.68 : x
  2. Step 2: Convert to fraction form
    12,065.76/16,660.08 = 7,879.68/x
  3. Step 3: Cross multiply
    12,065.76x = 16,660.08 × 7,879.68
  4. Step 4: Simplify right side
    12,065.76x = 131,276,099.17
  5. Step 5: Solve for x
    x = 131,276,099.17/12,065.76
  6. Step 6: Final answer
    x = 10,880.05

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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.