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Finding the Fourth Proportional to 7,999.91, 12,000.14 and 2,156.66

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Solution

The fourth proportional to 7,999.91, 12,000.14 and 2,156.66 is: 3,235.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.91 : 12,000.14 = 2,156.66 : x
  2. Step 2: Convert to fraction form
    7,999.91/12,000.14 = 2,156.66/x
  3. Step 3: Cross multiply
    7,999.91x = 12,000.14 × 2,156.66
  4. Step 4: Simplify right side
    7,999.91x = 25,880,221.93
  5. Step 5: Solve for x
    x = 25,880,221.93/7,999.91
  6. Step 6: Final answer
    x = 3,235.06

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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.