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Finding the Fourth Proportional to 8,405.67, 11,601.21 and 6,412.46

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Solution

The fourth proportional to 8,405.67, 11,601.21 and 6,412.46 is: 8,850.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.67 : 11,601.21 = 6,412.46 : x
  2. Step 2: Convert to fraction form
    8,405.67/11,601.21 = 6,412.46/x
  3. Step 3: Cross multiply
    8,405.67x = 11,601.21 × 6,412.46
  4. Step 4: Simplify right side
    8,405.67x = 74,392,263.01
  5. Step 5: Solve for x
    x = 74,392,263.01/8,405.67
  6. Step 6: Final answer
    x = 8,850.25

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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.