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Finding the Fourth Proportional to 8,424.30, 12,620.28 and 4,715.28

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Solution

The fourth proportional to 8,424.30, 12,620.28 and 4,715.28 is: 7,063.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,424.30 : 12,620.28 = 4,715.28 : x
  2. Step 2: Convert to fraction form
    8,424.30/12,620.28 = 4,715.28/x
  3. Step 3: Cross multiply
    8,424.30x = 12,620.28 × 4,715.28
  4. Step 4: Simplify right side
    8,424.30x = 59,508,153.88
  5. Step 5: Solve for x
    x = 59,508,153.88/8,424.30
  6. Step 6: Final answer
    x = 7,063.87

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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.