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Finding the Fourth Proportional to 8,418.88, 12,631.52 and 7,453.28

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Solution

The fourth proportional to 8,418.88, 12,631.52 and 7,453.28 is: 11,182.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.88 : 12,631.52 = 7,453.28 : x
  2. Step 2: Convert to fraction form
    8,418.88/12,631.52 = 7,453.28/x
  3. Step 3: Cross multiply
    8,418.88x = 12,631.52 × 7,453.28
  4. Step 4: Simplify right side
    8,418.88x = 94,146,255.39
  5. Step 5: Solve for x
    x = 94,146,255.39/8,418.88
  6. Step 6: Final answer
    x = 11,182.75

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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.