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Finding the Fourth Proportional to 12,661.66, 18,992.28 and 4,872.16

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Solution

The fourth proportional to 12,661.66, 18,992.28 and 4,872.16 is: 7,308.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.66 : 18,992.28 = 4,872.16 : x
  2. Step 2: Convert to fraction form
    12,661.66/18,992.28 = 4,872.16/x
  3. Step 3: Cross multiply
    12,661.66x = 18,992.28 × 4,872.16
  4. Step 4: Simplify right side
    12,661.66x = 92,533,426.92
  5. Step 5: Solve for x
    x = 92,533,426.92/12,661.66
  6. Step 6: Final answer
    x = 7,308.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.