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Finding the Fourth Proportional to 8,966.86, 13,455.90 and 3,420.68

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Solution

The fourth proportional to 8,966.86, 13,455.90 and 3,420.68 is: 5,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,966.86 : 13,455.90 = 3,420.68 : x
  2. Step 2: Convert to fraction form
    8,966.86/13,455.90 = 3,420.68/x
  3. Step 3: Cross multiply
    8,966.86x = 13,455.90 × 3,420.68
  4. Step 4: Simplify right side
    8,966.86x = 46,028,260.73
  5. Step 5: Solve for x
    x = 46,028,260.73/8,966.86
  6. Step 6: Final answer
    x = 5,133.15

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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.