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Finding the Fourth Proportional to 12,080.81, 16,665.08 and 7,043.19

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Solution

The fourth proportional to 12,080.81, 16,665.08 and 7,043.19 is: 9,715.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,080.81 : 16,665.08 = 7,043.19 : x
  2. Step 2: Convert to fraction form
    12,080.81/16,665.08 = 7,043.19/x
  3. Step 3: Cross multiply
    12,080.81x = 16,665.08 × 7,043.19
  4. Step 4: Simplify right side
    12,080.81x = 117,375,289.59
  5. Step 5: Solve for x
    x = 117,375,289.59/12,080.81
  6. Step 6: Final answer
    x = 9,715.85

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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.