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Finding the Fourth Proportional to 6,431.11, 8,858.77 and 6,431.11

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Solution

The fourth proportional to 6,431.11, 8,858.77 and 6,431.11 is: 8,858.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.11 : 8,858.77 = 6,431.11 : x
  2. Step 2: Convert to fraction form
    6,431.11/8,858.77 = 6,431.11/x
  3. Step 3: Cross multiply
    6,431.11x = 8,858.77 × 6,431.11
  4. Step 4: Simplify right side
    6,431.11x = 56,971,724.33
  5. Step 5: Solve for x
    x = 56,971,724.33/6,431.11
  6. Step 6: Final answer
    x = 8,858.77

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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.