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Finding the Fourth Proportional to 12,387.66, 18,568.50 and 4,065.54

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Solution

The fourth proportional to 12,387.66, 18,568.50 and 4,065.54 is: 6,094.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.66 : 18,568.50 = 4,065.54 : x
  2. Step 2: Convert to fraction form
    12,387.66/18,568.50 = 4,065.54/x
  3. Step 3: Cross multiply
    12,387.66x = 18,568.50 × 4,065.54
  4. Step 4: Simplify right side
    12,387.66x = 75,490,979.49
  5. Step 5: Solve for x
    x = 75,490,979.49/12,387.66
  6. Step 6: Final answer
    x = 6,094.05

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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.