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Finding the Fourth Proportional to 7,999.86, 12,000.06 and 2,156.52

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Solution

The fourth proportional to 7,999.86, 12,000.06 and 2,156.52 is: 3,234.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.86 : 12,000.06 = 2,156.52 : x
  2. Step 2: Convert to fraction form
    7,999.86/12,000.06 = 2,156.52/x
  3. Step 3: Cross multiply
    7,999.86x = 12,000.06 × 2,156.52
  4. Step 4: Simplify right side
    7,999.86x = 25,878,369.39
  5. Step 5: Solve for x
    x = 25,878,369.39/7,999.86
  6. Step 6: Final answer
    x = 3,234.85

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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.