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Finding the Fourth Proportional to 7,999.42, 11,989.56 and 5,655.88

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Solution

The fourth proportional to 7,999.42, 11,989.56 and 5,655.88 is: 8,477.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.42 : 11,989.56 = 5,655.88 : x
  2. Step 2: Convert to fraction form
    7,999.42/11,989.56 = 5,655.88/x
  3. Step 3: Cross multiply
    7,999.42x = 11,989.56 × 5,655.88
  4. Step 4: Simplify right side
    7,999.42x = 67,811,512.61
  5. Step 5: Solve for x
    x = 67,811,512.61/7,999.42
  6. Step 6: Final answer
    x = 8,477.05

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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.