Home / 8,178.72-11,286.90-4,642.08

Finding the Fourth Proportional to 8,178.72, 11,286.90 and 4,642.08

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Solution

The fourth proportional to 8,178.72, 11,286.90 and 4,642.08 is: 6,406.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.72 : 11,286.90 = 4,642.08 : x
  2. Step 2: Convert to fraction form
    8,178.72/11,286.90 = 4,642.08/x
  3. Step 3: Cross multiply
    8,178.72x = 11,286.90 × 4,642.08
  4. Step 4: Simplify right side
    8,178.72x = 52,394,692.75
  5. Step 5: Solve for x
    x = 52,394,692.75/8,178.72
  6. Step 6: Final answer
    x = 6,406.22

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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.