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Finding the Fourth Proportional to 8,005.86, 12,000.58 and 3,328.58

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Solution

The fourth proportional to 8,005.86, 12,000.58 and 3,328.58 is: 4,989.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,005.86 : 12,000.58 = 3,328.58 : x
  2. Step 2: Convert to fraction form
    8,005.86/12,000.58 = 3,328.58/x
  3. Step 3: Cross multiply
    8,005.86x = 12,000.58 × 3,328.58
  4. Step 4: Simplify right side
    8,005.86x = 39,944,890.58
  5. Step 5: Solve for x
    x = 39,944,890.58/8,005.86
  6. Step 6: Final answer
    x = 4,989.46

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1.5x scale

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.