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Finding the Fourth Proportional to 8,405.89, 11,600.03 and 4,869.43

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Solution

The fourth proportional to 8,405.89, 11,600.03 and 4,869.43 is: 6,719.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.89 : 11,600.03 = 4,869.43 : x
  2. Step 2: Convert to fraction form
    8,405.89/11,600.03 = 4,869.43/x
  3. Step 3: Cross multiply
    8,405.89x = 11,600.03 × 4,869.43
  4. Step 4: Simplify right side
    8,405.89x = 56,485,555.12
  5. Step 5: Solve for x
    x = 56,485,555.12/8,405.89
  6. Step 6: Final answer
    x = 6,719.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.