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Finding the Fourth Proportional to 12,080.64, 16,666.08 and 8,931.36

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Solution

The fourth proportional to 12,080.64, 16,666.08 and 8,931.36 is: 12,321.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,080.64 : 16,666.08 = 8,931.36 : x
  2. Step 2: Convert to fraction form
    12,080.64/16,666.08 = 8,931.36/x
  3. Step 3: Cross multiply
    12,080.64x = 16,666.08 × 8,931.36
  4. Step 4: Simplify right side
    12,080.64x = 148,850,760.27
  5. Step 5: Solve for x
    x = 148,850,760.27/12,080.64
  6. Step 6: Final answer
    x = 12,321.43

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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.