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Finding the Fourth Proportional to 12,387.92, 18,581.47 and 3,027.98

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Solution

The fourth proportional to 12,387.92, 18,581.47 and 3,027.98 is: 4,541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.92 : 18,581.47 = 3,027.98 : x
  2. Step 2: Convert to fraction form
    12,387.92/18,581.47 = 3,027.98/x
  3. Step 3: Cross multiply
    12,387.92x = 18,581.47 × 3,027.98
  4. Step 4: Simplify right side
    12,387.92x = 56,264,358.41
  5. Step 5: Solve for x
    x = 56,264,358.41/12,387.92
  6. Step 6: Final answer
    x = 4,541.87

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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.