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Finding the Fourth Proportional to 8,477.81, 12,712.61 and 2,929.21

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Solution

The fourth proportional to 8,477.81, 12,712.61 and 2,929.21 is: 4,392.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,477.81 : 12,712.61 = 2,929.21 : x
  2. Step 2: Convert to fraction form
    8,477.81/12,712.61 = 2,929.21/x
  3. Step 3: Cross multiply
    8,477.81x = 12,712.61 × 2,929.21
  4. Step 4: Simplify right side
    8,477.81x = 37,237,879.88
  5. Step 5: Solve for x
    x = 37,237,879.88/8,477.81
  6. Step 6: Final answer
    x = 4,392.39

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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.