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Finding the Fourth Proportional to 8,472.99, 12,708.68 and 5,184.39

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Solution

The fourth proportional to 8,472.99, 12,708.68 and 5,184.39 is: 7,776.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.99 : 12,708.68 = 5,184.39 : x
  2. Step 2: Convert to fraction form
    8,472.99/12,708.68 = 5,184.39/x
  3. Step 3: Cross multiply
    8,472.99x = 12,708.68 × 5,184.39
  4. Step 4: Simplify right side
    8,472.99x = 65,886,727.58
  5. Step 5: Solve for x
    x = 65,886,727.58/8,472.99
  6. Step 6: Final answer
    x = 7,776.09

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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.