Home / 8,178.42-11,285.79-4,642.77

Finding the Fourth Proportional to 8,178.42, 11,285.79 and 4,642.77

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Solution

The fourth proportional to 8,178.42, 11,285.79 and 4,642.77 is: 6,406.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.42 : 11,285.79 = 4,642.77 : x
  2. Step 2: Convert to fraction form
    8,178.42/11,285.79 = 4,642.77/x
  3. Step 3: Cross multiply
    8,178.42x = 11,285.79 × 4,642.77
  4. Step 4: Simplify right side
    8,178.42x = 52,397,327.24
  5. Step 5: Solve for x
    x = 52,397,327.24/8,178.42
  6. Step 6: Final answer
    x = 6,406.78

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Half scale
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Double scale
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Similar ratio
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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.