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Finding the Fourth Proportional to 18,472.12, 27,689.03 and 8,603.28

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Solution

The fourth proportional to 18,472.12, 27,689.03 and 8,603.28 is: 12,896.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,472.12 : 27,689.03 = 8,603.28 : x
  2. Step 2: Convert to fraction form
    18,472.12/27,689.03 = 8,603.28/x
  3. Step 3: Cross multiply
    18,472.12x = 27,689.03 × 8,603.28
  4. Step 4: Simplify right side
    18,472.12x = 238,216,478.02
  5. Step 5: Solve for x
    x = 238,216,478.02/18,472.12
  6. Step 6: Final answer
    x = 12,896.00

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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.